Perhaps you should try some spelling variations:
hoc thiet » hoc thieu, hoc thuyet, hoc hien
trinh vet » trinh viet, trinh vat, trinh ven
hang nong » thang long, han tong
ho chiet » ho chieu, ho thiet, hoa thiet
trinh ve » trinh he, trinh va, trinh vi
nong tac » cong tac, dong tac, nong tan
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: ((ho chiet) OR (hoc thiet)) tach - hanh ((trinh ve) or (trinh vet)) hang nong tac toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chiet) OR (hoc thiet)) tach - hanh ((trinh ve) OR (trinh vet)) hang nong tac toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chiet) OR (hoc thiet)) tach - hanh ((trinh ve) or (trinh vet)) hang nong tac toan tap".
• Adding a wildcard symbol may retrieve word variants: ((ho chiet) OR (hoc thiet)) tach - hanh ((trinh ve) or (trinh vet)) hang nong tac toan tap*.