Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
nhung cong » dung cong, thong cong, hang cong
hoc thiet » hoc thieu, hoc thuyet, hoc hien
trinh van » trinh han, trinh quan, trinh toan
van nhung » van nhuong, va nhung, van hung
doan phan » doanh phan, dan phan, doanh nhan
toan phan » thanh phan, toan ban, hoa phan
ho chiet » ho chieu, ho thiet, hoa thiet

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 chiet) OR (hoc thiet)) tach - canh trinh van nhung cong ((doan phan) OR (toan phan)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chiet) OR (hoc thiet)) tach - canh trinh van nhung cong ((doan phan) or (toan phan)) cau~".
• Adding a wildcard symbol may retrieve word variants: ((ho chiet) OR (hoc thiet)) tach - canh trinh van nhung cong ((doan phan) or (toan phan)) cau*.