Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh trinh » canh tranh, hanh chinh
hoc chieu » hoc thieu, ho chieu, hoc hien
trinh va » trinh van, trinh vat, trinh ve
va trong » va truong, va thong, va tuong
cong tan » cong tac, cong san, cong thanh
doan cau » toan cau, doan cap, doanh chau
doan dau » doan dieu, phan dau, doan va

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 xanh - hanh trinh va trong cong tan ((doan cau) or (doan dau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu xanh - hanh trinh va trong cong tan ((doan cau) OR (doan dau)).
• Adding a wildcard symbol may retrieve word variants: hoc chieu xanh - hanh trinh va trong cong tan ((doan cau) or (doan dau))*.