Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
cuoc dung » cuoc dong, duoc dung, quoc dung
cuoc cong » cuoc song, nuoc cong, buoc cong
cong tan » cong tac, cong san, cong thanh
tan van » tran van, tang van, luan van

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 tranh ((cuoc dung) or (cuoc cong)) cong tan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - canh tranh ((cuoc dung) OR (cuoc cong)) cong tan van ban*.