Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
tranh cuu » tranh cua, trinh cuu, tranh chua
nang cong » nang song, dang cong, hang cong
bang cong » dang cong, bang song, hang cong
danh toan » manh toan, anh toan, dan toan
tien anh » tieng anh, tien manh, dien anh
toan cau » 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 (tien anh)) - canh tranh cuu ((nang cong) OR (bang cong)) danh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (tien anh)) - canh tranh cuu ((nang cong) OR (bang cong)) danh toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu xanh) or (tien anh)) - canh tranh cuu ((nang cong) OR (bang cong)) danh toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) or (tien anh)) - canh tranh cuu ((nang cong) OR (bang cong)) danh toan cau*.