Perhaps you should try some spelling variations:
tieu sach » chieu sach, dien sach, te sach
hanh tang » hanh trang, anh tang, hanh mang
tang lan » tang luan, tang van, tang dan
lan dung » van dung, dan dung, lan hung
cong dan » cong san, cong tan, cong dong
toan cau » toan cao, toan tap, toan tai
toan ban » van ban

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 - hanh tang lan dung ((cong dan) or (huong dan)) ((toan cau) OR (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu sach - hanh tang lan dung ((cong dan) OR (huong dan)) ((toan cau) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo tieu sach - hanh tang lan dung ((cong dan) or (huong dan)) ((toan cau) OR (toan ban))".
• Adding a wildcard symbol may retrieve word variants: theo tieu sach - hanh tang lan dung ((cong dan) or (huong dan)) ((toan cau) OR (toan ban))*.