In addition to attributes, another way of simplifying the search process for users is to add descriptions to a file.
Descriptions can only be added to documents, binders, clauses, concepts and definitions. Not to proxies or images.
You can add a description (in multiple languages) by going to the description pane while editing a file. Click the 
button in the navigation menu on the right hand side.
Below are two examples of how descriptions will be shown when looking for a file.
A description as shown when searching in the Browse Files mode
A description as shown when searching for a clause in the Assemble Document mode.