To look at sth through fingers.
All that is suggesting to me is that the something being looked at is maybe unpleasant or a bit scary. So you take a peek at it through fingers instead of full-on looking at it directly, because you don't really want to see it at all.
Either that, or maybe it means to not get a clear picture of something?
Sth is trickling through fingers.
Does it mean to not quite get a grasp of something? Maybe a missed chance or opportunity? Or money, if a person is bad with finances?
If it's that then it's similar to the English phrase 'to slip through your fingers'.
Or like sand/water slipping through fingers, you can grasp some of it if you cup hands together, but most of it will be lost.
This one will be too easy for you Pawian:Put up a good face for a bad game