Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
trinh cua » trinh luat, trinh quan, trinh luan
hoc hieu » hoc thieu, hoc hien, doc hieu
tinh cua » sinh cua, tinh chat, tranh cua
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
chan tu » phan tu, han tu, chon tu

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 nganh - hanh ((trinh cua) OR (tinh cua)) nhung ((cong dan) or (cong tan)) chan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu nganh - hanh ((trinh cua) OR (tinh cua)) nhung ((cong dan) OR (cong tan)) chan tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hieu nganh - hanh ((trinh cua) OR (tinh cua)) nhung ((cong dan) or (cong tan)) chan tu".
• Adding a wildcard symbol may retrieve word variants: hoc hieu nganh - hanh ((trinh cua) OR (tinh cua)) nhung ((cong dan) or (cong tan)) chan tu*.