Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
thong cong » trong cong, tong cong, thong thong
anh tang » anh bang, anh dang, anh nang
va thong » va thuong, va phuong, he thong
van toan » van tan, van thanh, manh toan
van tuan » van quan, van ban, anh tuan

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 - ((anh tang) or (canh tranh)) va thong cong ((van toan) OR (van tuan)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - ((anh tang) OR (canh tranh)) va thong cong ((van toan) OR (van tuan)) ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu sach - ((anh tang) or (canh tranh)) va thong cong ((van toan) OR (van tuan)) ban".
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - ((anh tang) or (canh tranh)) va thong cong ((van toan) OR (van tuan)) ban*.