Perhaps you should try some spelling variations:
information propagation » information presentation, information organization
propagation a » propagation _
a decisional » _ decisional, a decision
david openg » david owens, david chieng
david ching » david machin
david heng » david hong, david hung, david chieng

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 a decisional ((((david openg) or (david ching))) or (david heng))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: information propagation a decisional ((((david openg) OR (david ching))) OR (david heng)).
• Adding a wildcard symbol may retrieve word variants: information propagation a decisional ((((david openg) or (david ching))) or (david heng))*.