Perhaps you should try some spelling variations:
dong yang » dong hoang, wang yang, yang yang
yang mind » yang cindy, sang minh, tang min
yang yao » yang yang, wang yan, yang yi
can data » can tata, dan data, fan data
yang jin » yang jie, yang jun, ying jin
than a » than _
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: dong yang yao ((than a) OR (can data)) ((yang mind) OR (yang jin)) how ai ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "dong yang yao ((than a) or (can data)) ((yang mind) OR (yang jin)) how ai ;~".
• Adding a wildcard symbol may retrieve word variants: dong yang yao ((than a) or (can data)) ((yang mind) OR (yang jin)) how ai ;*.