FEATURE REQUST: ability to build a search using AND and OR and NOT operators

[EmanuelFaria]

I don't know regex, and I've tried online regex builders, but they don't seem to be working out for me.

If you could add the ability to create a more complex search for example:

Find. photoprotective AND photoprotection AND photoprotecant
Find: antibacterial AND anti-bacterial

Or even ones with more than one word:

Find: antibactiostatic AND inhibits bacteria

That would be awesome. :)