The phrase "in holes corners" refers to those obscure and out-of-the-way places that often escape our notice. Synonyms for this phrase include "in nooks and crannies," "in obscure places," "in hidden crevices," "in secluded spots," "in remote corners," and "in forgotten recesses." These phrases convey a sense of tucked-away, even secretive, places that are both interesting and challenging to discover. They can apply to physical locations or to abstract concepts like ideas or details. The use of synonyms for "in holes corners" can add variety and depth to your writing, while conveying a sense of intrigue and discovery.