Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hieu quan » hieu qua, lieu quan, thien quan
cong tinh » cong trinh, cong vinh, long tinh
hoi hieu » hoi phieu, hoi tieu, moi hieu
hang cua » mang cua, hang ca, huong cua
manh cua » doanh cua, ban cua
toan cau » toan cao, toan ban, toan tai
toan tap » toan ban

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 quan - thanh ((hang cua) or (manh cua)) nhung cong tinh ((toan cau) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoi hieu quan - thanh ((hang cua) OR (manh cua)) nhung cong tinh ((toan cau) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: hoi hieu quan - thanh ((hang cua) or (manh cua)) nhung cong tinh ((toan cau) or (toan tap))*.