Perhaps you should try some spelling variations:
wang yidan » wang yan
gang yang » wang yang, yang yang, huang yang
wang dan » wang yan, wang ban, wang yang
yang yue » wang yue, yang yun, yang jui
yue gang » yu gang, yue wang, yue man
yi chang » ying chang, jin chang, vii chang
ii chang » vii chang, ii changes, iii change

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: ((wang dan) OR (wang yidan)) yang yue gang yang ((yi chang) OR (ii chang)) (hai OR hadi) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wang dan) or (wang yidan)) yang yue gang yang ((yi chang) OR (ii chang)) (hai or hadi) ;~".
• Adding a wildcard symbol may retrieve word variants: ((wang dan) or (wang yidan)) yang yue gang yang ((yi chang) OR (ii chang)) (hai or hadi) ;*.