Can you explain it for me? Thank for advanced.

Dear Torsten,

As you say in English there are many words which have the same meaning so sometime i have trouble when using these words. For example:" say, tell, speak"
I don’t know how to use these words in particular context so can you help me?

There is a very useful search function at the top of this webpage.
If you type the words
say tell speak
into the Google search box at the top of this page, then click on the ‘Forum search’ button (not the Google search button), then you will see a list of threads where this topic has already been discussed.
They should help you.

Yes, I get it. Thank so much.