Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
canh manh » lanh manh, canh tranh, cach mang
manh cua » doanh cua, ban cua
cua dung » cua dang, cua dong, qua dung
dung ung » dung cong
dan than » dan chan, ban than, van than
van toan » van tuan, van tan, van thanh

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 manh cua dung ung ((((xuan toan) or (dan than))) or (van toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - canh manh cua dung ung ((((xuan toan) OR (dan than))) OR (van toan)) cau.
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - canh manh cua dung ung ((((xuan toan) or (dan than))) or (van toan)) cau*.