Perhaps you should try some spelling variations:
information documents » information documentation, information agents, information requirements
documents set » documents et, documents best, documents self
set decision » soft decision, smart decision, agent decision
david walter » david canter, david carter, david wagner
david walker » david parker, dandy walker, david warren
david wave » david wake, david weaver, david waite

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: information documents set decision ((david wave) OR (((david walter) OR (david walker))))~.
• Adding a wildcard symbol may retrieve word variants: information documents set decision ((david wave) or (((david walter) or (david walker))))*.