Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, chien tranh
nhung cong » dung cong, thong cong, hang cong
hien hanh » dieu hanh
tang luan » dung luan
van nhung » van nhuong, va nhung, van hung
chinh cau » chinh chau, chinh can, chinh tai
cong dan » cong san, cong tan, huong dan
chinh ca » chinh ta, chinh va, chinh tai

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thien thanh) OR (hien hanh)) - tang luan van nhung cong dan ((chinh cau) or (chinh ca))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien thanh) OR (hien hanh)) - tang luan van nhung cong dan ((chinh cau) OR (chinh ca)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thien thanh) OR (hien hanh)) - tang luan van nhung cong dan ((chinh cau) or (chinh ca))".
• Adding a wildcard symbol may retrieve word variants: hoc ((thien thanh) OR (hien hanh)) - tang luan van nhung cong dan ((chinh cau) or (chinh ca))*.