When you are saved according to
Romans chapter 10: verses; 9 to 13
9.That if you will confess with your mouth the Lord Jesus,
and will believe in your heart that God had raised him (Jesus) from the dead,
you will be saved.
10.For with the heart man believes unto righteousness; and with the mouth confession is made unto salvation.
11.For the scripture say, Whosoever believes on him shall not be ashamed.
12.For there is no difference between the Jew and the Greek: for the same Lord over all is rich unto all that call upon him. (Jesus  does not care what you look like or where your from)
13. For whosoever shall call upon the name of the Lord shall be saved.

(When you believed on Jesus you were sealed with the Holy Spirit.!)
Ephesians chapter 1: verse 13.
In whom you also [trusted], after that you heard the word of truth, the gospel of your salvation: in whom also after that you believed, you were sealed with that Holy Spirit of promise,

The Lord wants his saved people to ask to be filled with the Holy Spirit.
Again Jesus will not force anything on you,
Jesus gave all of mankind a free will;
He wants you to freely choose to be filled.
In the book of Luke chapter 11:  verses 9 to 13 
9. And I say unto you, Ask, and it will be given you; seek, and you will find; knock, and it will be opened unto you.
10. For every one that asks receives; and he that seeks finds; and to him that knocks it shall be opened.
11. If a son shall ask bread of any of you that is a father, will he give him a stone? or if [he ask] a fish, will he for a fish give him a serpent?
12.Or if he shall ask an egg, will he offer him a scorpion?
13.If you then, being evil, know how to give good gifts unto your children:
how much more shall [your] heavenly
Father give the Holy Spirit to them that ask him?

The Holy Spirit is a Comforter,
Spirit of Truth, and He will teach you all things.
Remember they did not have the printed new testament, or a bible 2000 years ago:

Just ask and the lord and He will fill you with the Holy Spirit!
Say This:  
My Father, my God, I come to you in Jesus name, and I thank you that Jesus is my Lord and savior, 
I ask you now that you would fill me with the Holy Spirit, You said in your word that if I ask you would  fill me; So I ask now to be  
with the Holy Spirit, in Jesus  name;
I asked to be fill with the Holy Spirit;
so I thank you that I am now filled with the Holy Spirit,  and I can now speak in tongues. Thank You Jesus name; Amen.

Now just begin to speak but do not say any know language,
the sounds that come out of your month will be tongues.
It may be sounds that do not make sense. 
I can speak in tongues and wright a letter at the same time 
because my spirit is praying not me.Wow!
1Corinthians chapter; 14:verses 14-15
14.For if I pray in an [unknown] tongue,
my spirit prays, but my understanding is unfruitful.
(You can not understand)
15.What is it then? I will pray with the spirit, and I will pray with the understanding also:
I will sing with the spirit,
and I will sing with the understanding also.

Jude 1:20 and 21.
20. But you, beloved, building up yourselves on your most holy faith, praying in the Holy Ghost, 
21. Keep yourselves in the love of God, looking for the mercy of our Lord Jesus Christ unto eternal life.