Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
trung tuan » trung thanh, trung tam, tran tuan
doi chieu » doc hieu, doi chi, ho chieu
tang luan » dung luan
hang cong » dang cong, hang nong, bang cong
tan toan » tan tran, tap toan, van toan
bai toan » bai tap

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 - hanh ((trung tuan) or (tang luan)) hang cong ((tan toan) or (bai toan)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu xanh - hanh ((trung tuan) OR (tang luan)) hang cong ((tan toan) OR (bai toan)) ban.
• Adding a wildcard symbol may retrieve word variants: doi chieu xanh - hanh ((trung tuan) or (tang luan)) hang cong ((tan toan) or (bai toan)) ban*.