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
dang cong » dung cong
trinh va » trinh van, trinh vat, trinh ve
dan toan » van toan, dan than, manh toan
va dang » van dang, va nang, va lang

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