Perhaps you should try some spelling variations:
hieu quan » hieu qua, lieu quan, thien quan
hanh tang » hanh trang, anh tang, hanh mang
nhuan ban » nhat ban, thuat ban, nhuan tai
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
toan ban » van ban
ho hieu » ho chieu, hoi hieu, nho hieu
tang va » trang va, tang van, thang va
va nang » van nang, da nang, cam nang

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 tang va nang ((cong dan) or (cong tan)) ((nhuan ban) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu quan - hanh tang va nang ((cong dan) OR (cong tan)) ((nhuan ban) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: ho hieu quan - hanh tang va nang ((cong dan) or (cong tan)) ((nhuan ban) or (toan ban))*.