Perhaps you should try some spelling variations:
wang yang » wang yan, wang liang, wang yanling
yang yan » yang yang, wang yan, yang fan
yu wang » yue wang, yu fang, yu yang
yu gang » xu gang, yi gang, yu fang
yuan zi » yuan li, yuan fei, yuan hui
yan zi » yan zhi, ban zi
dang » dan, lang, dans

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang yang yan ((yu wang) or (yu gang)) ((yan zi) OR (yuan zi)) dang (hai or hadi) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang yang yan ((yu wang) OR (yu gang)) ((yan zi) OR (yuan zi)) dang (hai OR hadi) ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yang yan ((yu wang) or (yu gang)) ((yan zi) OR (yuan zi)) dang (hai or hadi) ;*".