I am learning English. Can you correct it, please? Thanks.

1. Nobody fate doesn't care you besides your own fate. No one/nobody really cares about your future/fate other than yourself.

2. He turned and went to the bridge. He did not see to anyone besides the stairs, so he did not stumble.

3. But they didn't could not/did not find him. No one didn't know knew/knows this man.

4. Anybody had understood can understand it by tonight that it had not has no meaning to talk with him.

Everybody understood that it had no meaning to talk with him.

5. Now nothing didn't concerned them. 

Now, nothing concerned them.

6. It doesn't confused really tenderness, it's very quite. (I cannot understand the meaning of this sentence.)

It is quite clear that It doesn't really convey tenderness.

7. Take some glases and come in 500 to our room, number 500.

8. It had/has been done doing by him by last year.

9. Will you take any some money for our trip? 

10. This is the book I used to read many times last summer. (You can use "that" as suggested by Zorobin.)

11. The man, who is sitting near my friend, is the president of the chess club in our University. He is very smart. I heard that he is involved in many chess competitions in all over the world.

12. I have a little time.

13. We have a few computer games.

14. There were not so much many people as I thought.

Nobody fate doesn't care you No one's fate bother you besides your own fate. 

He turned and went to the bridge. He didn't see to anyone besides the stairs, so didn't he did not stumble.
But they didn't could not find him, noone didn't knows this man.
Anybody had understood by night, that it had not meaning to talk with him. (I don't understand this sentence)
Now nothing didn't concerned them.
It doesn't does not confused really tenderness, it's very quite quiet.
Take some glases and come in 500 our room.
It had been doing has been done by him by last year.
Will you take any money for our trip.
This is the book that I used to read many times during last summer.
The man, who sit near my friend, is the president of the chess club in our University. He is very smart. I heard he is involved in many chess competition in all over the world.
I have little time.
We have a few computer games.
There were not so much many people, as I thought.

Some explanation...

1) Normally for written format, we do not use Didn't, Can't... Its only used when in speaking format. But, as a chatting purpose, we do use them still since its sort of like a conversation.

2) Didn't or Did not - means it is negative to the verb that are followed. For example: He did not sleep. This means sleep is negative = no sleep.

3) Those in green are confusing sentences. I can't understand them.

4) Much and Many - Much is used when things involved is uncountable. For example rice, water and yes, money (though i know we can "count" but it has a complicated explanation to it.) As for Many, it is used when things are countable like People, Animals, Utensils etc...

I hope it helped.