Perhaps you should try some spelling variations:
yuan cheng » yuan chang, huang cheng, yu cheng
liang tan » liang dan, wing tan
liang sun » liang dan, wing sun
cheng tan » cheng han, chen tan, cheng guan
tan yong » tan hong, tan kong, tan yang
yong seo » hong seo, kong sek, song so
a yuan » _ yuan, yan yuan

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "wang ((liang tan) OR (liang sun)) a yuan cheng tan yong seo ;~".
• Adding a wildcard symbol may retrieve word variants: wang ((liang tan) OR (liang sun)) a yuan cheng tan yong seo ;*.