not like
With the NOT LIKE operator you can use wild card characters in a search condition to test a text property. You can use more than one wild card in a test.
To match one or more characters, use * or %. For example
Last_name NOT LIKE Br*
finds all documents in which the index field Last_name is not Br and does not begin with Br.
To match one character, use ? or _. For example
Last_name NOT LIKE Brow_
finds all documents in which the index field Last_name is anything other than five letters beginning with Brow.
If you are using Advanced Find to search for CS documents based on item ID and using the NOT LIKE operator, use the _ or ? wild card to pad your search value to nine characters.
The NOT LIKE operator performs a sequential search even when the field is a retrieval key. Do not expect speedy results when using the NOT LIKE operator. For best results, combine the condition with a folder name condition or a key condition.