passer au peigne fin (ww):
uitkammen(en) to search thoroughly as if raking over an area with a comb.
(en) to search through (thoroughly)., afschuimen(en) to search an area thoroughly., onder de loep nemen(en) to search (something or somewhere) meticulously.
Via: Dbnary en WikiWoordenboeken
Via: Memodata.com