Perhaps you should try some spelling variations:
chieu sach » chiet tach, chieu sang, chieu xanh
canh tran » canh tranh, hanh trang, banh trang
hang cong » dang cong, hang nong, bang cong
tran van » luan van
van hang » van khang, van hoang, van thang
cong tac » cong ty
toan cau » toan cao, toan ban, toan tai
toan tap » toan ban

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chieu sach) or (chinh sach)) - canh tran van hang cong tac ((toan cau) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sach) OR (chinh sach)) - canh tran van hang cong tac ((toan cau) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) or (chinh sach)) - canh tran van hang cong tac ((toan cau) or (toan tap))*.