Perhaps you should try some spelling variations:
toan thuat » toan thuc, toan thiet, toan thue
nhung cong » dung cong, thong cong, hang cong
cong san » cong tac
san khan » san khau, san khac, san phan
khan cap » khan ap, than cap, khoan cam
hoc thi » hoc thai, hoc tai, hoc chi
luan » quan, lan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thi thanh - tinh ((toan thuat) or (luan thiet)) nhung cong san khan cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thi thanh - tinh ((toan thuat) OR (luan thiet)) nhung cong san khan cap.
• Adding a wildcard symbol may retrieve word variants: hoc thi thanh - tinh ((toan thuat) or (luan thiet)) nhung cong san khan cap*.