Perhaps you should try some spelling variations:
cong thanh » dong thanh, cong trinh, truong thanh
hanh tang » hanh trang, anh tang, hanh mang
theo thu » theo chu, theo tu, theo tieu
thu sach » tu sach, thuat sach, thuoc sach
tang cua » mang cua, hang cua, tang luan
cong tan » cong tac, cong san, cong ty
toan cau » toan cao, toan ban, toan tai
toan tap » toan 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 thu sach - hanh tang cua cong ((cong tan) or (cong thanh)) ((toan cau) OR (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo thu sach - hanh tang cua cong ((cong tan) OR (cong thanh)) ((toan cau) OR (toan tap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo thu sach - hanh tang cua cong ((cong tan) or (cong thanh)) ((toan cau) OR (toan tap))".
• Adding a wildcard symbol may retrieve word variants: theo thu sach - hanh tang cua cong ((cong tan) or (cong thanh)) ((toan cau) OR (toan tap))*.