When searching, the ability to add boolean operators such as AND/OR/NOT would be helpfull. Either by writing them in the searchfield or selecting them from a drop down list attatched to each search field.
For example searching for "human" AND "samples" should only display hits that match both search terms.
In the current version adding a new search field uses the OR operator and you will get matches on every box (or sample) that matches either one of your search fields.
Also "like"
We would like AND/OR/NOT options in the search, but also Does Not Equal, Does Not Contain, Is Blank, Is Not Blank in addition to "contains" and "equals" options.