Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
tranh doan » tran doan, trang doan, tranh toan
doan trung » do trung, dac trung, xuan trung
hoc chieu » hoc thieu, ho chieu, hoc hien
tuong dan » tung dan, xuong dan, truong dai
toan cau » toan cao, toan tap, toan tai
toan ban » van ban

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 - canh tranh doan trung ((tuong dan) or (huong dan)) ((toan cau) OR (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu xanh - canh tranh doan trung ((tuong dan) OR (huong dan)) ((toan cau) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu xanh - canh tranh doan trung ((tuong dan) or (huong dan)) ((toan cau) OR (toan ban))".
• Adding a wildcard symbol may retrieve word variants: hoc chieu xanh - canh tranh doan trung ((tuong dan) or (huong dan)) ((toan cau) OR (toan ban))*.