Perhaps you should try some spelling variations:
cong thuong » hang thuong
thuong dan » huong dan, thuong han, thuong dam
hieu quan » hieu qua, lieu quan, thien quan
chinh cua » chinh ca, chinh sua, hinh cua
hoi hieu » hoi phieu, hoi tieu, moi hieu
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 - hanh chinh cua cong thuong dan ((toan cau) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoi hieu quan - hanh chinh cua cong thuong dan ((toan cau) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: hoi hieu quan - hanh chinh cua cong thuong dan ((toan cau) or (toan tap))*.