GTS SPL Sensitivity and check logic

Hello Gurus

Hoping for some help. I've seen the posts regarding SPL sensitivity and they have been pretty useful (to a certain extent, my understanding isn't brilliant), however I have a question.

I have an SPL entry SAN SAN YI, this hits against every single customer with the word SAN in their name, for example, SAN DIEGO ZOO, SAN ANTONIO FIRE DEPT etc etc,

I also have similar issues with other really common words such as TRADING, INTERNATIONAL, COMPANY, LIMITED etc etc..... can anyone help with how i can stop the really common words hitting the sales orders????

Thanks

Tom