Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
cua truong » cua trung, xuan truong, cac truong
doi chieu » doc hieu, doi chi, ho chieu
tranh cua » doanh cua, manh cua
cong hoan » cong hoa, dong hoa, cong ha
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: doi chieu sang - canh tranh cua truong ((cong hoan) or (cong san)) phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - canh tranh cua truong ((cong hoan) OR (cong san)) phan cau.
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - canh tranh cua truong ((cong hoan) or (cong san)) phan cau*.