Perhaps you should try some spelling variations:
than quoc » han quoc, tran quoc, toan quoc
cua triet » cua viet, su triet, va triet
vu khich » vu khach, vu khanh, vu khac
khich le » thinh le, dich le, tich le
hai khoi » mai khoi, thai khoa, chai khoa
tai khoi » tai khoa, mai khoi, tao khoi
qua than » qua thanh, qua phan, qua tan
thanh di » thanh doi, thanh de, thanh do
le hang » le hoang, le thang, le hong
di cua » dai cua, doi cua, de cua
gia » giao

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu khich le hang ((hai khoi) or (tai khoi)). hieu qua than quoc gia thanh di cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu khich le hang ((hai khoi) OR (tai khoi)). hieu qua than quoc gia thanh di cua triet.
• Adding a wildcard symbol may retrieve word variants: vu khich le hang ((hai khoi) or (tai khoi)). hieu qua than quoc gia thanh di cua triet*.