Perhaps you should try some spelling variations:
wang dan » wang yan, wang ban, wang yidan
gang yan » wang yan, gang yao, wang yang
yi chang » ii chang, ying chang, jin chang
dan yan » dan yang, nan yan, wang yan
yu gang » xu gang, yi gang, yu fang
yi dang » yi gang, yi yang
yan yu » yun yu, yan yuan, yang yue

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 yan yu gang yan ((yi dang) or (yi chang)) (hai or hadi) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang dan yan yu gang yan ((yi dang) OR (yi chang)) (hai OR hadi) ;*.