Perhaps you should try some spelling variations:
chin chang » china chang, chain change, china zhang
china han » china hand, china has, china chang
yan wang » yuan wang, yang yang, qian wang
yang jun » yang jui, pang jun, yang jin
xin hong » min hong, xie hong, xin tong
tin hong » tan hong, kia hong, thi hong
yan jia » yan jiu, yang jie, yang jin

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

• Performing a fuzzy search may retrieve terms with similar spellings: yan wang ((yan jia) or (yang jun)) ((chin chang) or (china han)) ((xin hong) OR (tin hong)) seo ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: yan wang ((yan jia) OR (yang jun)) ((chin chang) OR (china han)) ((xin hong) OR (tin hong)) seo ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "yan wang ((yan jia) or (yang jun)) ((chin chang) or (china han)) ((xin hong) OR (tin hong)) seo ;".
• Adding a wildcard symbol may retrieve word variants: yan wang ((yan jia) or (yang jun)) ((chin chang) or (china han)) ((xin hong) OR (tin hong)) seo ;*.