If I go to the game's sub-site, and search for a mod, the search box at the top of the page will search for all mods whose titles INCLUDE the text I provide. However, if I'm adding a new file, the search box that allows me to specify required files will only return titles that START with the specified text.
As an example, if I search Fallout 4 mods for the text "thicket", I get six results returned, including neeher's "SS1 Thicket Executions". If I try to add a new file, and enter "thicket" in the search box for requirements, I only have two to choose from; "Thicket And Concord Parking Settlement Spot" and "Thicket excavations settlement". To add neeher's mod, I have to enter "ss1", which is probably not the most memorable part of the title.
For consistency, and for convenience, all these search boxes should search for included text, not just initial text.
As background, this came up as a result of the problem that CrimsonReaperRT had in loading his new mod Le-xi's Scuba Park.