Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh trinh » canh tranh, hanh chinh
trinh va » trinh van, trinh vat, trinh ve
va trong » va truong, va thong, va tuong
cong tap » cuong tap, cong tac, tong tap
cong tan » cong tac, cong san, cong thanh
doan cao » doanh cao, toan cao, doan cap

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

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