Perhaps you should try some spelling variations:
wang yidan » wang yan
yang liang » wang liang, yan liang, yang yang
yuan ming » yuan ting, kian ming, tuan minh
ming cong » minh cong, ming kong, ming code
wang dan » wang yan, wang ban, wang yang
yang li » yang lin, yang di, yang xi
li yuan » liu yuan, li quan, li yun

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((wang dan) OR (wang yidan)) ((yang li) OR (yang liang)) li yuan ming cong shu ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wang dan) OR (wang yidan)) ((yang li) or (yang liang)) li yuan ming cong shu ;~".
• Adding a wildcard symbol may retrieve word variants: ((wang dan) OR (wang yidan)) ((yang li) or (yang liang)) li yuan ming cong shu ;*.