Perhaps you should try some spelling variations:
tieu sach » chieu sach, dien sach, te sach
hang cong » dang cong, hang nong, bang cong
mang cua » manh cua, ban cua, cong cua
dung cua » dung luan, dung cho
cong san » cong tac
chan tap » han tap, phan tap, toan tap
chan ta » chan tha, nhan tai, nhan tao

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 (dung cua)) hang cong san ((chan tap) OR (chan ta))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu sach - hanh ((mang cua) OR (dung cua)) hang cong san ((chan tap) OR (chan ta)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo tieu sach - hanh ((mang cua) or (dung cua)) hang cong san ((chan tap) OR (chan ta))".
• Adding a wildcard symbol may retrieve word variants: theo tieu sach - hanh ((mang cua) or (dung cua)) hang cong san ((chan tap) OR (chan ta))*.