Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
chieu xanh » chieu sach, chieu sang, hieu manh
hanh trang » thanh trung, canh tranh, hanh trinh
dung cong » dung trong
trang va » tran van, hang va
cong san » cong tac
than cau » toan cau, phan cau, than cap
toan tap » toan ban
va dung » van dung, va duong, vat dung

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 tinh) or (chieu xanh)) - hanh trang va dung cong san ((than cau) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu tinh) OR (chieu xanh)) - hanh trang va dung cong san ((than cau) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu tinh) or (chieu xanh)) - hanh trang va dung cong san ((than cau) or (toan tap))*.