Perhaps you should try some spelling variations:
quang trong » quang truong, quang trung, quan trong
hoc thiet » hoc thuyet, hoc hien, toc thieu
hoc thieu » toc thieu, hoc hien
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan ban » van ban

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc thiet) OR (hoc thieu)) tach - hanh tinh quang trong cong tac toan ban~".
• Adding a wildcard symbol may retrieve word variants: ((hoc thiet) OR (hoc thieu)) tach - hanh tinh quang trong cong tac toan ban*.