Perhaps you should try some spelling variations:
information propagation » information presentation, information organization
how decisions » _ decisions, buy decisions, big decisions
a decisions » a decision, _ decisions, a decisional
david openg » david owens, david chieng
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 ((how decisions) OR (a decisions)) ((david openg) or (david heng))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: information propagation ((how decisions) OR (a decisions)) ((david openg) OR (david heng)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "information propagation ((how decisions) OR (a decisions)) ((david openg) or (david heng))".
• Adding a wildcard symbol may retrieve word variants: information propagation ((how decisions) OR (a decisions)) ((david openg) or (david heng))*.