can't see the wood for the trees

Từ điển tiếng Anh - Cambridge Advanced Learners Dictionary

can't see the wood for the trees idiom UK ( US can't see the forest for the trees )
to be unable to understand a situation clearly because you are too involved in it
Thesaurus⁺: ↑Difficult to understand ↑Complicated and difficult to do ↑Puzzle and confuse
Main entry: see_idiom