Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, nghiep nganh
chinh quan » chinh luan, chinh quyen, chinh ngan
quan trong » gian trong
cong thanh » dong thanh, cong trinh, cong tan
hieu manh » chieu xanh, dieu hanh, hien hanh
long tinh » cong tinh, trong tinh, luong tin
toan ban » van ban

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) OR (hieu nganh)) - hanh chinh quan trong ((cong thanh) or (long tinh)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu manh) OR (hieu nganh)) - hanh chinh quan trong ((cong thanh) OR (long tinh)) toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu manh) OR (hieu nganh)) - hanh chinh quan trong ((cong thanh) or (long tinh)) toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) OR (hieu nganh)) - hanh chinh quan trong ((cong thanh) or (long tinh)) toan ban*.