Is it normal that when i input charity donations, tuitions fees and bus passes that my refund stays the same?

No it's not usual but it does happen.

This depends on whether or not you owe any tax.

There are a lot of other possibilities, but the reason is likely that you don't need the either of those credits.

If you owed taxes and had charitable donations, tuition or public transit passes, those credits would reduce your taxes owed until they were reduced to $ 0.00.

You should carry forward the donations to future years to reduce taxes payable since it isn't making any difference in your refund this year.