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general::
Phrase(s): hunt high and low (for someone or something) [and] look high and low (for someone or something); search high and low (for someone or something)
Fig. to look carefully in every possible place for someone or something. • We looked high and low for the right teacher. • The Smiths are searching high and low for the home of their dreams.
McGrawhill's American Idioms And Phrasal Verbs