Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
canh trinh » canh tranh, hanh trinh, canh tinh
luan thang » luan thanh, xuan thang, luan tang
quan thanh » ban thanh, van thanh
long dan » long doan, cong dan, nong dan
dan than » dan chan, ban than, van than
than cau » toan cau, phan cau, than cap

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 sach - canh trinh ((luan thang) or (quan thanh)) long dan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - canh trinh ((luan thang) OR (quan thanh)) long dan than cau*.