Perhaps you should try some spelling variations:
wang dan » wang yan, wang ban, wang yidan
dan gang » dan yang, den gang, deng gang
gang zum » zugang zum, zwang zum, drang zum
zum gang » zum umgang
gang yan » wang yan, gang yao, wang yang
ii chang » vii chang, yi chang, ii changes
i gang » ii gang, li gang, yi gang

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang dan gang zum gang yan ((i gang) or (ii chang)) (hai or hadi) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang dan gang zum gang yan ((i gang) OR (ii chang)) (hai OR hadi) ;*.