Perhaps you should try some spelling variations:
kyoung yun » young yun, kyoung yang, hyoung gun
yang yang » wang yang, wang yan
cost data » test data
data case » data base, data based
wing tan » wing ian, liang tan, hong tan
way your » why your, day your, pay your
way you » why you

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((wing tan) or (((yang yang) or (dong sin)))) ((way your) OR (way you)) cost data case kyoung yun ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((wing tan) OR (((yang yang) OR (dong sin)))) ((way your) OR (way you)) cost data case kyoung yun ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wing tan) or (((yang yang) or (dong sin)))) ((way your) OR (way you)) cost data case kyoung yun ;".
• Adding a wildcard symbol may retrieve word variants: ((wing tan) or (((yang yang) or (dong sin)))) ((way your) OR (way you)) cost data case kyoung yun ;*.