Perhaps you should try some spelling variations:
tieu sach » chieu sach, dien sach, te sach
luan dong » luan cong, luan nong, luan luong
quan dong » quang dong, quan long, quan hoang
anh bang » anh hoang, anh quang, tinh bang
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo tieu sach - anh bang ((luan dong) OR (quan dong)) cong dan toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo tieu sach - anh bang ((luan dong) OR (quan dong)) cong dan toan cao*".