Perhaps you should try some spelling variations:
dong ryangg » dong yang
wang yong » wang yang, wang hyoung, wang yan
rana hua » wang hua, tan hua
hua rent » hua ren
yan guan » yan yuan, yang guang, yihan guan
gan guan » quan guan, fan guon, gui guan
wong yue » wang yue

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((dong ryangg) or (wang yong)) rana hua rent ((yan guan) OR (gan guan)) ((hong yu) or (wong yue)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((dong ryangg) OR (wang yong)) rana hua rent ((yan guan) OR (gan guan)) ((hong yu) OR (wong yue)) ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((dong ryangg) or (wang yong)) rana hua rent ((yan guan) OR (gan guan)) ((hong yu) or (wong yue)) ;".
• Adding a wildcard symbol may retrieve word variants: ((dong ryangg) or (wang yong)) rana hua rent ((yan guan) OR (gan guan)) ((hong yu) or (wong yue)) ;*.