Perhaps you should try some spelling variations:
yang yang » wang yang, wang yan
a changed » _ changed, a change, has changed
shang hai » shang kai, dang hai, hong hai
wan yang » wang yang, dan yang, tan yang
chang ha » chang mae
wong yue » wang yue, hong yu
a chang » a change, ca change, a changin

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: wan yang yang judy ((a chang) OR (a changed)) won ((((shang hai) OR (chang ha))) OR (wong yue)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wan yang yang judy ((a chang) or (a changed)) won ((((shang hai) OR (chang ha))) or (wong yue)) ;~".
• Adding a wildcard symbol may retrieve word variants: wan yang yang judy ((a chang) or (a changed)) won ((((shang hai) OR (chang ha))) or (wong yue)) ;*.