Perhaps you should try some spelling variations:
thanh tung » thanh cong
tham trong » thay trong, than trong, thap trong
pham trong » pham thuong, pham cong, nam trong
thanh chau » thanh cha, thanh cham, thanh chu
tieu sach » chieu sach, dien sach, te sach
cong tac » cong ty
toan cau » 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 - thanh tung ((tham trong) OR (pham trong)) cong tac ((thanh chau) or (toan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu sach - thanh tung ((tham trong) OR (pham trong)) cong tac ((thanh chau) OR (toan cau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo tieu sach - thanh tung ((tham trong) OR (pham trong)) cong tac ((thanh chau) or (toan cau))".
• Adding a wildcard symbol may retrieve word variants: theo tieu sach - thanh tung ((tham trong) OR (pham trong)) cong tac ((thanh chau) or (toan cau))*.