Perhaps you should try some spelling variations:
ying yang » yin yang, ying chang, wang yang
yang yang » wang yang, wang yan
dang haji » dang hai, dato haji
wei chen » frei chen, jui chen, yi chen
wei shen » kwei sheng, enwei shen, wei shang
yang jie » yang jin, yang di, yang jui
yang xi » yang di, yang yi, yang jui

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 (wei shen)) ((yang jie) or (yang xi)) dang haji ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ran ((ying yang) OR (yang yang)) ((wei chen) OR (wei shen)) ((yang jie) OR (yang xi)) dang haji ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ran ((ying yang) or (yang yang)) ((wei chen) OR (wei shen)) ((yang jie) or (yang xi)) dang haji ;".
• Adding a wildcard symbol may retrieve word variants: ran ((ying yang) or (yang yang)) ((wei chen) OR (wei shen)) ((yang jie) or (yang xi)) dang haji ;*.