This paper introduces and demonstrates MWE-Finder, an application to search for flexible multiword expressions (MWEs) in Dutch text corpora, starting from an example. If the example is in canonical form, the application automatically generates three queries to search for sentences that contain an occurrence of the MWE and thus enables efficient analysis of its properties. The application offers canonical forms for more than 11k MWEs. Searching is done in treebanks, so the grammatical structure of the sentences is taken into account.