Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
canh thanh » canh tranh, danh thanh, anh thanh
hoc chieu » hoc thieu, ho chieu, hoc hien
thanh cac » hanh cac, thanh bac, thanh ca
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
phan cau » phan dau, phan cac, phan tu

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 sang - canh thanh cac truong ((cong dan) or (cong san)) phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sang - canh thanh cac truong ((cong dan) OR (cong san)) phan cau.
• Adding a wildcard symbol may retrieve word variants: hoc chieu sang - canh thanh cac truong ((cong dan) or (cong san)) phan cau*.