Perhaps you should try some spelling variations:
thieu nganh » hieu nganh, trien nganh, nghiep nganh
hoc thieu » toc thieu, hoc hien
trinh xac » trinh xay, trinh cac, trinh xuan
tinh xay » trinh xay, tinh tay, tinh xach
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
hang dau » hang va, hang tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thieu nganh - canh ((tinh xay) or (trinh xac)) dung ((cong dan) or (cong san)) hang dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu nganh - canh ((tinh xay) OR (trinh xac)) dung ((cong dan) OR (cong san)) hang dau.
• Adding a wildcard symbol may retrieve word variants: hoc thieu nganh - canh ((tinh xay) or (trinh xac)) dung ((cong dan) or (cong san)) hang dau*.