Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh trinh » hanh chinh
quang song » quang dong, quang cuong, quang hoang
song trong » cong trong, dong trong, sang trong
hoc chieu » hoc thieu, ho chieu, hoc hien
cac toan » cac khoan, hach toan, cac thanh
toan ban » van ban

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) or (canh tranh)) quang song trong cac toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu xanh - ((hanh trinh) OR (canh tranh)) quang song trong cac toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc chieu xanh - ((hanh trinh) or (canh tranh)) quang song trong cac toan ban*.