Perhaps you should try some spelling variations:
dong hoang » hong hong
dong yang » yang yang, dan yang, dong jung
wang yang » wang yan, wang liang, wang yanling
congo war » congo what, congo a, congo can
rein yan » ren yan
yan jiu » yang jie, yang jin, pang jiu
a rein » a reine, a reit, a region

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 yang) or (dong hoang))) or (wang yang)) a rein yan jiu ((kong sar) or (congo war)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang ((((dong yang) OR (dong hoang))) OR (wang yang)) a rein yan jiu ((kong sar) OR (congo war)) ;.
• Adding a wildcard symbol may retrieve word variants: wang ((((dong yang) or (dong hoang))) or (wang yang)) a rein yan jiu ((kong sar) or (congo war)) ;*.