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 nang, anh sang
anh dang » anh dong, anh dung, anh bang
va thong » va thuong, va phuong, he thong
dan than » ban than, van than, dan toan
dan chan » dan gian, dan ca, van chat

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