Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
truong cua » truong quan, truong cao, huong cua
nhung cong » dung cong, thong cong, hang cong
truong ca » truong cao, truong va, trong ca
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cau » toan cao, toan ban, toan tap
ha tinh » va tinh, may tinh

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 (ha tinh)) - hanh ((truong cua) OR (truong ca)) nhung cong dan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (ha tinh)) - hanh ((truong cua) OR (truong ca)) nhung cong dan toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu xanh) or (ha tinh)) - hanh ((truong cua) OR (truong ca)) nhung cong dan toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) or (ha tinh)) - hanh ((truong cua) OR (truong ca)) nhung cong dan toan cau*.