Perhaps you should try some spelling variations:
hieu quan » hieu qua, lieu quan, thien quan
dung cong » dung trong
cong manh » cong danh, duong manh, cong thanh
manh toan » thanh toan, anh tuan, tinh toan
hoi hieu » hoi phieu, hoi tieu, moi hieu
hang cua » hang ca, huong cua, thong cua
mang cua » manh cua, dung cua, ban cua
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 quan - thanh ((hang cua) or (mang cua)) dung cong manh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoi hieu quan - thanh ((hang cua) OR (mang cua)) dung cong manh toan cau.
• Adding a wildcard symbol may retrieve word variants: hoi hieu quan - thanh ((hang cua) or (mang cua)) dung cong manh toan cau*.