Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu tinh, hieu manh
chieu sang » chieu sach, hieu lang, nhieu tang
hanh trinh » canh tranh, hanh chinh
nhung cong » thong cong, hang cong, nhung don
thanh than » thanh thanh, thanh thang, thanh toan
dung cong » dung trong
trinh va » trinh van, trinh vat, trinh ve
than cau » toan cau, phan cau, than cap

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)) - hanh trinh va ((nhung cong) OR (dung cong)) thanh than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu xanh) OR (chieu sang)) - hanh trinh va ((nhung cong) OR (dung cong)) thanh than cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu xanh) or (chieu sang)) - hanh trinh va ((nhung cong) OR (dung cong)) thanh than cau".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu xanh) or (chieu sang)) - hanh trinh va ((nhung cong) OR (dung cong)) thanh than cau*.