Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hanh trung » thanh trung, hanh trang, manh trung
hieu quan » hieu qua, lieu quan, thien quan
trung cua » truong cua, trung tuan, trung cap
cua nhung » va nhung
cong san » cong tac
toan cau » toan cao, toan ban, toan tai
toan tap » toan ban
ho hieu » ho chieu, hoi hieu, nho hieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho hieu quan - hanh trung cua nhung cong san ((toan cau) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu quan - hanh trung cua nhung cong san ((toan cau) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: ho hieu quan - hanh trung cua nhung cong san ((toan cau) or (toan tap))*.