Perhaps you should try some spelling variations:
control case » control based, control costs
aid control » aids control, pid control, add control
ying yang » yang yang, yin yang, ying chang
yang jui » yang yi
yang aid » yang anda, yang mind, can aid
nan yan » nan ya, wang yan, qian yan
yang xi » yang yi

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

• Performing a fuzzy search may retrieve terms with similar spellings: nan yan ((((((yang xi) or (yang di))) or (yang jui))) or (yang judy)) ying yang aid control case ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nan yan ((((((yang xi) OR (yang di))) OR (yang jui))) OR (yang judy)) ying yang aid control case ;*.