Perhaps you should try some spelling variations:
dong yang » dong hoang, wang yang, yang yang
than data » than death, loan data, can data
sang minh » kang minah, anh minh, song min
yang yao » yang yang, wang yan, yang yi
than you » can you
minh how » mind how, minh hoa, myth how
how ai » how aid, how ae, how am

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

• Performing a fuzzy search may retrieve terms with similar spellings: dong yang yao ((than you) or (than data)) sang minh how ai ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: dong yang yao ((than you) OR (than data)) sang minh how ai ;*.