turn up
to appear or arrive unexpectedly. Ex.: He turned up late to the party.
find out
to discover information. Ex.:I found out the answer after the class.
look for
to search for something. Ex.: She is looking for her keys.
work out
to understand or solve something. Ex.: We worked out the math problem together.
to come across
to find something by chance. Ex.: I came across an old photo in my room.
look into
to investigate something. Ex.: The police will look into the problem.