Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
nhung cong » thong cong, hang cong, nhung don
hieu manh » chieu xanh, hieu nganh, dieu hanh
chinh cua » chinh ca, chinh sua, hinh cua
dung cong » dung trong
san than » sang than, san thanh, ban than
than cau » toan cau, phan cau, than cap

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