Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
chieu xanh » chieu sach, chieu sang, hieu manh
hanh trinh » canh tranh, hanh chinh
dang cong » dung cong
trinh ve » trinh he, trinh va, trinh vi
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan ban » van ban
ve dang » le dang, vu dang, de dang

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