Perhaps you should try some spelling variations:
david test » david west, david tblt
davis test » davis best, david west, davis tsu
yan wang » yuan wang, yang yang, qian wang
kim dong » kim jong, kim young, kim eung
kim song » kim young, kim eung
wan yan » wang yan, nan yan, wai yan
wind » wing, find

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

• Performing a fuzzy search may retrieve terms with similar spellings: wan yan wang ((david test) OR (davis test)) yong ((kim dong) or (kim song)) (sin or wind) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wan yan wang ((david test) OR (davis test)) yong ((kim dong) OR (kim song)) (sin OR wind) ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wan yan wang ((david test) OR (davis test)) yong ((kim dong) or (kim song)) (sin or wind) ;*".