Perhaps you should try some spelling variations:
thanh luan » tranh luan, thanh xuan, thanh tuan
phung cong » nhung cong, phong cong, nhung chong
hung cong » nhung cong, hung cuong, dung cong
chi xanh » chi anh, chi hanh, chieu xanh
chi danh » chi dan, chi anh, chi dinh
san toan » van toan, dan toan, manh toan
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chi xanh) OR (chi danh)) - thanh luan van ((hung cong) or (phung cong)) san toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chi xanh) OR (chi danh)) - thanh luan van ((hung cong) OR (phung cong)) san toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chi xanh) OR (chi danh)) - thanh luan van ((hung cong) or (phung cong)) san toan cao".
• Adding a wildcard symbol may retrieve word variants: doi ((chi xanh) OR (chi danh)) - thanh luan van ((hung cong) or (phung cong)) san toan cao*.