Perhaps you should try some spelling variations:
tieu sach » chieu sach, dien sach, te sach
cong cong » cong dong, trong cong, dung cong
mang cua » manh cua, dung cua, ban cua
hang cua » hang ca, huong cua, thong cua
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh 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 ((mang cua) or (hang cua)) cong cong dan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu sach - hanh ((mang cua) OR (hang cua)) cong cong dan toan cau.
• Adding a wildcard symbol may retrieve word variants: theo tieu sach - hanh ((mang cua) or (hang cua)) cong cong dan toan cau*.