Perhaps you should try some spelling variations:
ying yang » yin yang, ying chang, wang yang
yang yang » wang yang, wang yan
wei chen » wei shen, frei chen, yi chen
jui chen » yi chen
yang jie » yang jin, yang di, yang jui
yang yi » yang di, yang xi, yang jui
hai » hadi, haji, hari

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

• Performing a fuzzy search may retrieve terms with similar spellings: ran ((ying yang) OR (yang yang)) ((wei chen) or (jui chen)) ((yang jie) or (yang yi)) dang hai ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ran ((ying yang) OR (yang yang)) ((wei chen) OR (jui chen)) ((yang jie) OR (yang yi)) dang hai ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ran ((ying yang) OR (yang yang)) ((wei chen) or (jui chen)) ((yang jie) or (yang yi)) dang hai ;*".