can't see further than the end of your nose

Từ điển tiếng Anh - Cambridge Advanced Learners Dictionary

can't see further than the end of your nose idiom
If someone can't see further than the end of their nose, they do not notice what is happening around them.
Thesaurus⁺: ↑Not paying attention ↑Treating as unimportant ↑Neglecting and ignoring
Main entry: see_idiom