Perhaps you should try some spelling variations:
yang yang » wang yang, wang yan
tan yang » dan yang, tan ying, tan yong
hang shu » zhang shuo, cong shu, tan shu
chang su » chang hsun, chang fwu, chang gui
ho kong » ho kwong, hong kong, cho tong
li lan » lai lan, li lin, li nan
lan ho » plan how, lean how

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 ((yang yang) OR (tan yang)) li lan ho kong ((hang shu) OR (chang su)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang ((yang yang) or (tan yang)) li lan ho kong ((hang shu) OR (chang su)) ;~".
• Adding a wildcard symbol may retrieve word variants: wang ((yang yang) or (tan yang)) li lan ho kong ((hang shu) OR (chang su)) ;*.