Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu xanh » chieu sach, chieu sang, chieu tinh
canh trinh » canh tranh, hanh trinh, canh tinh
trinh thuc » trinh tu, trinh thi
xuong cong » luong cong, duong cong, cuong cong
tap toan » tap doan, tap quan, bai toan
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: theo chieu xanh - canh trinh thuc ((dung trong) or (xuong cong)) tap toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu xanh - canh trinh thuc ((dung trong) OR (xuong cong)) tap toan ban*.