Perhaps you should try some spelling variations:
long thanh » luong thanh, long han, long trinh
liang dan » liang tan, king dan, liang sun
hao zhang » xiao zhang, zhao zheng, ceo zhang
congo can » congo call, congo a, congo war
line how » one how
cong van » duong van, cong sun
how hao » how has, how have

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((liang dan) OR (long thanh)) line how hao zhang fan ((congo can) OR (cong van)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((liang dan) or (long thanh)) line how hao zhang fan ((congo can) OR (cong van)) ;~".
• Adding a wildcard symbol may retrieve word variants: ((liang dan) or (long thanh)) line how hao zhang fan ((congo can) OR (cong van)) ;*.