Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
phuong van » phung van, phong van, phuong lan
hoc chieu » hoc thieu, ho chieu, hoc hien
ba trung » tai trung, nam trung, do trung
van toan » van tuan, van tan, van thanh
toan cau » toan cao, toan ban, toan tap

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 - canh tranh ((cac truong) or (ba trung)) phuong van toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu xanh - canh tranh ((cac truong) OR (ba trung)) phuong van toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc chieu xanh - canh tranh ((cac truong) or (ba trung)) phuong van toan cau*.