Perhaps you should try some spelling variations:
rating costs » trading costs, roaming costs, rising costs
lang yanling » wang yanling, wang yangming, zhang yunling
risk rating » risk taking, risk sharing
how slower » has slower, how slow, low lower
dong skin » dong sin, dong bin, dof skin
ka a » kai a, a a, k 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 yanling) OR (dong skin)) ka a risk rating costs how slower ;~.
• Adding a wildcard symbol may retrieve word variants: ((lang yanling) or (dong skin)) ka a risk rating costs how slower ;*.