Perhaps you should try some spelling variations:
tieu sach » chieu sach, dien sach, te sach
luan cong » luong cong, luan chung, luan luong
luat cong » thuat cong, luat chung, cua cong
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 cong) OR (luat cong)) cong dan toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo tieu sach - anh bang ((luan cong) OR (luat cong)) cong dan toan cao*".