Perhaps you should try some spelling variations:
yuan chang » yuan cheng, huang chang, han chang
wang yang » wang yan, wang liang, wang yanling
weng fang » jing fang
wen wang » wei wang, chen wang, men want
pong yan » dong yang, wang yan, kong yam
tan hua » tuan hua, wang hua, tan chia
tuan vu » thanh vu, tuan hua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((yuan chang) or (wang yang)) ((tan hua) or (tuan vu)) ((wen wang) OR (weng fang)) ping pong yan ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((yuan chang) OR (wang yang)) ((tan hua) OR (tuan vu)) ((wen wang) OR (weng fang)) ping pong yan ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((yuan chang) or (wang yang)) ((tan hua) or (tuan vu)) ((wen wang) OR (weng fang)) ping pong yan ;".
• Adding a wildcard symbol may retrieve word variants: ((yuan chang) or (wang yang)) ((tan hua) or (tuan vu)) ((wen wang) OR (weng fang)) ping pong yan ;*.