Perhaps you should try some spelling variations:
information propagation » information presentation, information organization
propagation buy » propagation due, propagation lazy, propagation _
david chieng » david ching, david chang, david heng
david openg » david owens, david heng
decisions » decision

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

• Performing a fuzzy search may retrieve terms with similar spellings: information propagation buy decisions ((david openg) or (david chieng))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: information propagation buy decisions ((david openg) OR (david chieng)).
• Adding a wildcard symbol may retrieve word variants: information propagation buy decisions ((david openg) or (david chieng))*.