Perhaps you should try some spelling variations:
cong thuong » hang thuong
thuong dan » huong dan, thuong han, thuong dam
hieu manh » chieu xanh, hieu nganh, dieu hanh
lanh manh » lanh tranh, lan anh, van manh
hoc hieu » hoc thieu, hoc hien, doc hieu
manh cua » doanh cua, ban cua
hanh cac » hang cac, nhanh cay, hanh va
hanh cat » hanh luat, nhanh cay, hanh va

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hieu manh - lanh manh cua cong thuong dan ((hanh cac) or (hanh cat))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - lanh manh cua cong thuong dan ((hanh cac) OR (hanh cat))*.