Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh trinh » canh tranh, hanh chinh
tieu xanh » tieu danh, dieu hanh, tien anh
trinh va » trinh van, trinh vat, trinh ve
va trong » va truong, va thong, va tuong
dong van » duong van, dang van, dong von
toan cao » toan ban, toan tap
dong va » dung va, dong ha, luong va

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 ((tieu xanh) OR (chieu xanh)) - hanh trinh va trong ((dong van) OR (dong va)) toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((tieu xanh) OR (chieu xanh)) - hanh trinh va trong ((dong van) or (dong va)) toan cao~".
• Adding a wildcard symbol may retrieve word variants: theo ((tieu xanh) OR (chieu xanh)) - hanh trinh va trong ((dong van) or (dong va)) toan cao*.