Exclusive Tradeskill Searches?

[Seagoat]

Would there be any way to search for recipes that don't contain some specified text?

For instance, a friend wants to do a search for Alchemy recipes that don't contain "Essence of" so he can find poisons easier. (Searching for "poison" doesn't return all poisons...it would be too much to ask for the poisons to actually be called poisons! )

Can it be done?