Perhaps you should try some spelling variations:
thanh trung » thanh tung
van duong » van dong, van dung, van phong
hoc tang » hoc tan, hoc tieng, hoc trong
hoc bang » hoc bong, hoc dan, hoc bai
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: ((hoc tang) or (hoc bang)) sach - thanh trung ((van duong) or (tin dung)) cong tac toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc tang) OR (hoc bang)) sach - thanh trung ((van duong) OR (tin dung)) cong tac toan tap.
• Adding a wildcard symbol may retrieve word variants: ((hoc tang) or (hoc bang)) sach - thanh trung ((van duong) or (tin dung)) cong tac toan tap*.