For example: Huntington, minocycline, R6/2. You can use boolean opeartors OR and AND to create your queries, e.g.: minocycline AND R6/2 SCA3 OR SCA6 OR SCA17 (HD AND SCA3) OR BLOOD You can also use the NOT operator: R7E or PrP-SCA7-c92Q not nuclear inclusions R7E or PrP-SCA7-c92Q not nuclear inclusions not retinopathy R7E or PrP-SCA7-c92Q not (nuclear inclusions or retinopathy) NOT anxiety NOT SCA3 NOT SCA17 NOT anxiety