Perhaps you should try some spelling variations:
tieu sach » chieu sach, dien sach, te sach
trinh vet » trinh viet, trinh vat, trinh ven
hang cong » dang cong, hang nong, bang cong
trinh ve » trinh he, trinh va, trinh vi
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
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 tieu sach - hanh ((trinh ve) or (trinh vet)) hang cong tac toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu sach - hanh ((trinh ve) OR (trinh vet)) hang cong tac toan tap.
• Adding a wildcard symbol may retrieve word variants: theo tieu sach - hanh ((trinh ve) or (trinh vet)) hang cong tac toan tap*.