Perhaps you should try some spelling variations:
yang thang » yang yang, gung thang, nang trang
than china » tuan china, han china, wuhan china
thang long » change long
yan yuan » yan guan, fang yuan, nan yan
hui yang » hui ying, du yang, h yang
tan hua » tuan hua, wang hua, tan chia
wang » wing, wan, lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((wang yan) or (yan yuan)) ((((yuan fei) or (tan hua))) or (than china)) hui yang thang long run ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((wang yan) OR (yan yuan)) ((((yuan fei) OR (tan hua))) OR (than china)) hui yang thang long run ;.
• Adding a wildcard symbol may retrieve word variants: ((wang yan) or (yan yuan)) ((((yuan fei) or (tan hua))) or (than china)) hui yang thang long run ;*.