"Have you got a chance to" vs "Did you get a chance to"
Solution 1:
"Have you got a chance to X?" asks if the person has a chance to do something. E.g. "Have you got a chance to win the lottery?"
It essentially implies that being able to do something is mostly out of your control.
Asking "Have you got a chance to look into this?" would imply that "looking into this" is something that one is unlikely to do with out a lot of luck.
"Did you get a chance to X?" ask if the person has had time to do X. E.g. "Did you get a chance to go to the shop?"
It essentially implies that being able to do something is mostly constrained by other things in your schedule.
Asking "Did you get a chance to look into this?" would imply that "looking into this" is something that must compete with other things one must do to become a high enough priority to be done.
So 1) is about luck and 2) is about time management.
Solution 2:
I'm no expert, however it seems to me that "Have you got a chance to look at this?" sounds a little forced- I think you're confusing tenses here.
For the past tense case, in which you are asking the second person whether or not they have looked at a document, stick to either:
- "Did you get a chance to look at this?"
- "Have you had a chance to look at it?"
which are basically equivalent in meaning. For the present tense example in which you are asking the second person whether they have time to look at the document now, or in the near future, better to use the simpler:
"Do you have time to look at this?"