Perhaps you should try some spelling variations:
hieu manh » chieu xanh, hieu nganh, dieu hanh
cua thong » cua thuong, cua khong, suat thong
hoc hieu » hoc thieu, hoc hien, doc hieu
cua tong » cua cong, cua dong, cua nong
cong tan » cong tac, cong san, cong thanh
toan cao » toan ban
toan tap » toan 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 - anh huong ((cua thong) OR (cua tong)) cong tan ((toan cao) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - anh huong ((cua thong) OR (cua tong)) cong tan ((toan cao) OR (toan tap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hieu manh - anh huong ((cua thong) OR (cua tong)) cong tan ((toan cao) or (toan tap))".
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - anh huong ((cua thong) OR (cua tong)) cong tan ((toan cao) or (toan tap))*.