Perhaps you should try some spelling variations:
yang yuan » fang yuan, yan yuan, wang yuhan
hong jong » hong kong
tan yong » tan hong, tan kong, tan yang
yang yun » yang jun, tang yun, yang yue
hong hai » shang hai, zhong tai, dang hai
chang ha » chang mae
yan jiu » yang jie, yang jin, pang jiu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tan yong ((yang yuan) or (yang yun)) wang yan jiu ((((hong hai) or (chang ha))) or (hong jong)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tan yong ((yang yuan) OR (yang yun)) wang yan jiu ((((hong hai) OR (chang ha))) OR (hong jong)) ;.
• Adding a wildcard symbol may retrieve word variants: tan yong ((yang yuan) or (yang yun)) wang yan jiu ((((hong hai) or (chang ha))) or (hong jong)) ;*.