Perhaps you should try some spelling variations:
yang guang » yang yang, yang liang
weng john » wong john, wrong john, king john
kong sara » kong sar
yan tuan » yan yuan, anh tuan, can turn
yan guan » gan guan, yan yuan, yihan guan
ren weng » den weg
hua ren » hua chen
von sl » von sa, von sles

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 tuan) or (((yan guan) OR (yang guang)))) hua ren weng john ((von sl) or (kong sara)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: lang ((yan tuan) OR (((yan guan) OR (yang guang)))) hua ren weng john ((von sl) OR (kong sara)) ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "lang ((yan tuan) or (((yan guan) OR (yang guang)))) hua ren weng john ((von sl) or (kong sara)) ;*".