Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu tinh, hieu manh
chieu sang » chieu sach, hieu lang, nhieu tang
trong manh » trong anh, trong mach, trong canh
trong minh » truong minh, trong kinh, thong minh
hanh tran » hanh trang, thanh tran, hanh tram
tran van » luan van
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: hoc ((chieu xanh) or (chieu sang)) - hanh tran van dong ((trong manh) OR (trong minh)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (chieu sang)) - hanh tran van dong ((trong manh) OR (trong minh)) toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu xanh) or (chieu sang)) - hanh tran van dong ((trong manh) OR (trong minh)) toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) or (chieu sang)) - hanh tran van dong ((trong manh) OR (trong minh)) toan cao*.