Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
trung tran » trung tuan, trung thanh, trung tam
nhung cong » dung cong, thong cong, hang cong
doi chieu » doc hieu, doi chi, ho chieu
tung tran » hung tran, huong tran, quang tran
ban toan » ban than, van toan, bao 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 - thanh ((tung tran) or (trung tran)) nhung cong ((ban toan) OR (bai toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu xanh - thanh ((tung tran) OR (trung tran)) nhung cong ((ban toan) OR (bai toan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu xanh - thanh ((tung tran) or (trung tran)) nhung cong ((ban toan) OR (bai toan)) cau".
• Adding a wildcard symbol may retrieve word variants: doi chieu xanh - thanh ((tung tran) or (trung tran)) nhung cong ((ban toan) OR (bai toan)) cau*.