Perhaps you should try some spelling variations:
dong hoang » hong hong
hong wang » hong gang, hong kong, hong jong
zhi test » ai test, i test, ii test
api test » ai test, i test, ii test
yang jui » yang judy, yang di, yang xi
wong sam » wong sau, wong lai, von sam
sar » sara, star, saur

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang ((dong hoang) or (hong wang)) ((zhi test) or (api test)) yang jui ((wong sam) OR (kong sar)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang ((dong hoang) OR (hong wang)) ((zhi test) OR (api test)) yang jui ((wong sam) OR (kong sar)) ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang ((dong hoang) or (hong wang)) ((zhi test) or (api test)) yang jui ((wong sam) OR (kong sar)) ;".
• Adding a wildcard symbol may retrieve word variants: wang ((dong hoang) or (hong wang)) ((zhi test) or (api test)) yang jui ((wong sam) OR (kong sar)) ;*.