Perhaps you should try some spelling variations:
chieu xanh » chieu sang, chieu tinh, hieu manh
chieu sach » chinh sach, chiet tach, chieu sang
hanh trong » hanh trang, anh trong, hinh trong
trong hiep » trong dieu
hiep thong » nghiep thong, tiep thuong, he thong
huong manh » duong manh, hung manh, phuong danh
luong manh » duong manh, luong thanh, duong minh
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 sach)) - hanh trong hiep thong ((huong manh) OR (luong manh)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (chieu sach)) - hanh trong hiep thong ((huong manh) OR (luong manh)) toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu xanh) or (chieu sach)) - hanh trong hiep thong ((huong manh) OR (luong manh)) toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) or (chieu sach)) - hanh trong hiep thong ((huong manh) OR (luong manh)) toan cao*.