Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
thang long » thanh cong
long thanh » luong thanh, dong thanh, cong thanh
hieu quan » hieu qua, lieu quan, thien quan
cong thai » cong hai, hong thai, cong thanh
lua thang » la thang, xua thang, luan thanh
thanh phi » thanh pho, thanh phan, thanh pham
thai lua » thai luan, thai luat, thai cua
phi phi » chi phi, phi thi, thi phi

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((hieu quan) or (chieu tinh)) - cong thai lua thang long thanh phi phi~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((hieu quan) OR (chieu tinh)) - cong thai lua thang long thanh phi phi.
• Adding a wildcard symbol may retrieve word variants: doi ((hieu quan) or (chieu tinh)) - cong thai lua thang long thanh phi phi*.