Perhaps you should try some spelling variations:
thai thanh » thi thanh, tai thanh, hai thanh
toan thuat » toan thuc, toan thue, toan hoat
toan thiet » hoan thien, luan thiet, toan tien
nhung cong » dung cong, thong cong, hang cong
hoc thai » toc thai, hoc tai, hoc hai
cong san » cong tac
san khan » san khau, san khac, san phan
khan cap » khan ap, than cap, khoan cam

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

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