To search for a file that has a given md5, sha1 or sha256 just type in the hash under consideration in the main search box. Example, searching for the file with md5: 12602de6659a356141e744bf569e7e56 .
If you have a list of hashes (e.g. exported from some other application), with independence of the type of hash (md5, sha1 or sha256) and whether they are mixed, and you want to search for all of them at the same time you should refer to the search for hashes feature at the main landing site. You just have to paste your hashes and click on the search button.
Updated about a year ago