Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hieu manh » chieu xanh, hieu nganh, dieu hanh
hien hanh » dieu hanh
chinh cua » chinh sua, hinh cua, chinh luan
cong sang » cong san, cong lang, cong vang
sang phan » sang than, nang phan, san phan
chinh ca » chinh ta, chinh va, chinh tai
phan lap » phan dau

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 (hien hanh)) - hanh ((chinh cua) OR (chinh ca)) nhung cong sang phan lap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu manh) OR (hien hanh)) - hanh ((chinh cua) OR (chinh ca)) nhung cong sang phan lap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu manh) or (hien hanh)) - hanh ((chinh cua) OR (chinh ca)) nhung cong sang phan lap".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) or (hien hanh)) - hanh ((chinh cua) OR (chinh ca)) nhung cong sang phan lap*.