Perhaps you should try some spelling variations:
damping factors » driving factors, acting factors, making factors
risk damping » risk mapping, drift damping, risk taking
factors kong » factors box, factors can
lang yan » wang yan, wang yang, zhang yan
kong siu » kong eiu, wong siu, dong sin
kai a » kai fa, ka a
k a » uk a

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: ((lang yan) OR (dof skin)) ((k a) OR (kai a)) risk damping factors kong siu ;~.
• Adding a wildcard symbol may retrieve word variants: ((lang yan) or (dof skin)) ((k a) or (kai a)) risk damping factors kong siu ;*.