Perhaps you should try some spelling variations:
ren shang » wei shang, rent sharing
john wong » john bonn
john song » john bonn, john ngosong
wing yan » wang yan, wing ian, wing tan
tuan hua » tuan vu
yuan hui » yuan fei, jaan hui, yang hui
tan hua » wang hua, tan chia, tan puay

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

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