every nook and cranny

every nook and cranny
(every part of a place; everywhere; in every little place where the thing could be found) — каждый уголок, каждый закоулок; в самых укромных уголках или закоулках

Example 1: This house is where I grew up. I know every nook and cranny of it. (Cambridge Idioms Dictionary)
Example 2: Law books were stuffed into every nook and cranny of his office. (Cambridge Dictionary of American Idioms)
Example 3: Every nook and cranny of the house was stuffed with souvenirs of their trips abroad. (CALD)
Example 4: I've searched for it in every nook and cranny, and I still can't find it. (The American Heritage Dictionary of Idioms by Christine Ammer)
Example 5: "I looked all over my apartment for your earring." — "Did you check every nook and cranny?" (goenglish.com)

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Nook — a small corner, alcove, or recess, especially one in a large room; a hidden or secluded spot