Perhaps you should try some spelling variations:
shen chin » shen chang, when china, wen chin
chin chin » china china
soon heng » soon beng, soon ang
soon seng » soon beng, khoon seng, soon siong
yang yao » yang yang, wang yan, yang yi
yao yang » yang yang
yang hua » wang hua, yang hui, ying hua

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: yang yao yang hua ((shen chin) OR (chin chin)) ((soon heng) OR (soon seng)) seo ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "yang yao yang hua ((shen chin) or (chin chin)) ((soon heng) OR (soon seng)) seo ;~".
• Adding a wildcard symbol may retrieve word variants: yang yao yang hua ((shen chin) or (chin chin)) ((soon heng) OR (soon seng)) seo ;*.