Across

Finding

come across	Have you come across any good stories in the paper?
run across	I ran across this report while searching on the internet for info on this company.
stumble across	I stumbled across your webpage and was really impressed.

Communication

come across	He comes across as insecure and needy.
get across	He is a good public speaker. He has no problem getting his message across.
put across	The advert is intended to put across the message that piracy damages movie production.