Perhaps you should try some spelling variations:
hien nhanh » thien thanh, tien thanh, dien thanh
thanh tung » thanh cong
trong tap » trong thap, tong tap, trong tan
tung qua » dung qua, tuong quan, trung quan
qua dung » quang dung, su dung, qua song
tap toan » tap doan, tap quan, bai 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 ((hien nhanh) or (((hien hanh) OR (dieu hanh)))) - thanh tung qua dung trong tap toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien nhanh) OR (((hien hanh) OR (dieu hanh)))) - thanh tung qua dung trong tap toan tap*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien nhanh) or (((hien hanh) OR (dieu hanh)))) - thanh tung qua dung trong tap toan tap*".