Perhaps you should try some spelling variations:
long thanh » luong thanh, long han, long trinh
thanh tan » thanh van, thanh dam
john song » john wong, john bonn, john ngosong
xiao yang » xiao zhang, xia fang, xiao yuan
jun song » jin song, yun song, hyun song
yang hua » wang hua, yang hui, ying hua
tan li » tang li, tian li, gan li

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

• Performing a fuzzy search may retrieve terms with similar spellings: long thanh tan li ((jun song) or (john song)) xiao yang hua ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: long thanh tan li ((jun song) OR (john song)) xiao yang hua ;*.