Perhaps you should try some spelling variations:
thien chanh » thien thanh, thien chinh, hien hanh
phung cong » nhung cong, nhung chong, dung cong
phong cong » phong chong, thong cong, chong cong
hanh luan » khanh luan, hang luan, hanh luat
dan chinh » dang chinh, lan chinh, van chinh
chinh can » chinh ca, chinh ban, chinh cau
tien anh » tieng anh, tien manh, dien anh

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

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