Terms for subject Cliche / convention containing could be

English	Russian
I could be wrong	я могу ошибаться ("What is the difference between an alligator and a crocodile?" "I believe the main difference is that one will see you later and the other will see you in awhile. I could be wrong, I'm not a zoologist." (Twitter) ART Vancouver)
nothing could be further from the truth	дальше этого от истины нет ничего (ART Vancouver)
what could be better	что может быть лучше (Юрий Гомон)