Perhaps you should try some spelling variations:
thuat trong » thuat song
trinh thuat » trinh luat, trinh thiet, trinh thuc
chieu xanh » chieu sach, chieu tinh, hieu manh
chieu sang » chieu sach, hieu lang, nhieu tang
canh trinh » canh tranh, hanh trinh, canh tinh
cong tan » cong tac, cong san, cong thanh
tan chan » dan chan, ban chan, can chan
chan cau » phan cau, can cau, chinh cau

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu xanh) or (chieu sang)) - canh trinh thuat trong cong tan chan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu xanh) OR (chieu sang)) - canh trinh thuat trong cong tan chan cau.
• Adding a wildcard symbol may retrieve word variants: theo ((chieu xanh) or (chieu sang)) - canh trinh thuat trong cong tan chan cau*.