Perhaps you should try some spelling variations:
china boon » china boom, china bond, china box
boon cong » boon chong, boon siong
lang yan » wang yan, wang yang, zhang yan
gang yao » wang yan, ganga ya, sang yoo
yang yao » yang yang, wang yan, yang yi
yang hui » wang hui, yang muxi, zhang hui
yang jui » yang judy, yang di, yang xi
cong sun » cong shu, cong van, wing sun

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((lang yan) or (((gang yao) or (yang yao)))) ((yang hui) OR (yang jui)) china china boon cong sun ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((lang yan) OR (((gang yao) OR (yang yao)))) ((yang hui) OR (yang jui)) china china boon cong sun ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((lang yan) or (((gang yao) or (yang yao)))) ((yang hui) OR (yang jui)) china china boon cong sun ;".
• Adding a wildcard symbol may retrieve word variants: ((lang yan) or (((gang yao) or (yang yao)))) ((yang hui) OR (yang jui)) china china boon cong sun ;*.