Perhaps you should try some spelling variations:
yang yang » wang yang, wang yan
yang mind » yang cindy, yang jin, sang minh
than bad » than bau, than a, than big
can data » can tata, dan data, fan data
yang ka » yang fan, yang yao
how hai » how has, how hci, how have
how ai » how aid, how ae, how am

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: yang yang ka ((than bad) OR (can data)) yang mind ((how hai) OR (how ai)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "yang yang ka ((than bad) or (can data)) yang mind ((how hai) OR (how ai)) ;~".
• Adding a wildcard symbol may retrieve word variants: yang yang ka ((than bad) or (can data)) yang mind ((how hai) OR (how ai)) ;*.