Perhaps you should try some spelling variations:
tieu sach » chieu sach, dien sach, te sach
hanh tang » hanh trang, hanh tung, nhanh thang
hanh mang » nhanh mang, hanh trang, nhanh lang
cong cong » cong dong, trong cong, dung cong
anh tang » anh bang, anh dang, anh nang
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
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 - ((((hanh tang) OR (anh tang))) or (hanh mang)) cua cong cong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu sach - ((((hanh tang) OR (anh tang))) OR (hanh mang)) cua cong cong tac toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo tieu sach - ((((hanh tang) OR (anh tang))) or (hanh mang)) cua cong cong tac toan cau".
• Adding a wildcard symbol may retrieve word variants: theo tieu sach - ((((hanh tang) OR (anh tang))) or (hanh mang)) cua cong cong tac toan cau*.