Perhaps you should try some spelling variations:
trung doanh » trong doanh, dung doanh, trung anh
trung thanh » truong thanh
hieu lang » chieu sang, hieu quang, nhieu tang
cong tinh » cong trinh, cong vinh, cong thanh
long tinh » trong tinh, luong tin, dong tin
hoi hieu » hoi phieu, hoi tieu, moi hieu
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoi hieu lang - manh ((trung doanh) OR (trung thanh)) nhung ((cong tinh) or (long tinh)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoi hieu lang - manh ((trung doanh) OR (trung thanh)) nhung ((cong tinh) OR (long tinh)) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoi hieu lang - manh ((trung doanh) OR (trung thanh)) nhung ((cong tinh) or (long tinh)) toan cau".
• Adding a wildcard symbol may retrieve word variants: hoi hieu lang - manh ((trung doanh) OR (trung thanh)) nhung ((cong tinh) or (long tinh)) toan cau*.