Perhaps you should try some spelling variations:
thanh trung » thanh tung
theo chieu » theo tieu, theo chu
nhung cong » dung cong, thong cong, hang cong
thi chieu » thi chien, thi hieu, thi hien
trung hoc » trung quoc
hoc nhung » hoa nhung, hon nhung, nuoc nhung
ho chieu » hoc thieu, doi chieu, mot chieu
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cao » toan ban, toan tap

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (((theo chieu) OR (thi chieu)))) tinh - thanh trung hoc nhung cong tac toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (((theo chieu) OR (thi chieu)))) tinh - thanh trung hoc nhung cong tac toan cao~".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (((theo chieu) OR (thi chieu)))) tinh - thanh trung hoc nhung cong tac toan cao*.