Right now you cannot search for multiple different items at once.
For example, you cannot search "Guardian Staff" and "Historic Sword" at the same time with the same keyword.
It would be nice if there was simple formatting for the keywords/strings we search for, so for example, we could type "Guardian Staff, Historic Sword, Amethyst" and look up all 3 items at once, as separated by a comma.
It would be very convenient for, for instance, looking up the name of a male armor and female armor counterpart at the same time, for example "Nanex Helmet, Naneon Helmet". Or just to always check on a few unrelated items you check on regularly! You could have those keywords around and just copy-paste them for efficiency.