Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
thanh luan » tranh luan, thanh xuan, thanh tuan
chong cong » cong cong, cuong cong, phong cong
thong cong » trong cong, tong cong, thong thong
hoc thieu » toc thieu, hoc hien
khoan cam » khoa cam, khoan va, phan cam
khan cap » khan ap, than cap, phan cac

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - thanh luan van ((chong cong) OR (thong cong)) dan ((khan cap) OR (khoan cam))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - thanh luan van ((chong cong) OR (thong cong)) dan ((khan cap) or (khoan cam))~".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - thanh luan van ((chong cong) OR (thong cong)) dan ((khan cap) or (khoan cam))*.