Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
thanh tung » thanh cong
doi chieu » doc hieu, doi chi, ho chieu
cua hang » cua nhung, cua cong, cua ban
cua dang » cua cong, cua ban
bai toan » bai tap
toan tap » toan ban

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu xanh - thanh tung ((cua hang) or (cua dang)) nhung bai toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu xanh - thanh tung ((cua hang) OR (cua dang)) nhung bai toan tap*.