Perhaps you should try some spelling variations:
vien nganh » vien thanh
trinh xac » trinh xay, trinh cac, trinh xuan
hoc vien » hoc hien, hoc viet, hoc tieng
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 vien 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 vien nganh - canh ((tinh xay) OR (trinh xac)) dung ((cong dan) OR (cong san)) hang dau.
• Adding a wildcard symbol may retrieve word variants: hoc vien nganh - canh ((tinh xay) or (trinh xac)) dung ((cong dan) or (cong san)) hang dau*.