Hum. Well, it does search for phrases, but the words must be in the exact order you place them.
For example, on my site, if you search for
increase decrease
you get no results, but if you search for
increase or decrease
you get my Inventory Pricing Mod.
It would take a bit of coding to return results for the 1st case. I'm not sure if that improved searching mod does that or not as I've not tried it. Maybe someone else will know.
Wish I could help more.
Carrie