Perhaps you should try some spelling variations:
john song » john bonn, john ngosong
john wong » john bonn
yan guan » gan guan, yang guang, yihan guan
yan yuan » fang yuan, nan yan, yan clan
ren yang » ren yan, chen yang, pei yang
dan yang » daun yang, tan yang, wang yang
wang » wing, wan, lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang ((yan guan) or (yan yuan)) hua ((ren yang) OR (dan yang)) ((john song) or (john wong)) sam ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang ((yan guan) OR (yan yuan)) hua ((ren yang) OR (dan yang)) ((john song) OR (john wong)) sam ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang ((yan guan) or (yan yuan)) hua ((ren yang) OR (dan yang)) ((john song) or (john wong)) sam ;*".