Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hanh tranh » canh tranh, hanh trang, lanh tranh
trinh toan » tinh toan, thanh toan, trinh quan
hieu lang » chieu sang, hieu quang, nhieu tang
bang cong » dang cong, bang song, hang cong
trinh han » trinh quan
cua bang » chua bang, cua ban, cua dang
ho hieu » ho chieu, hoi hieu, nho hieu

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 hieu lang - ((hanh tranh) OR (hanh trinh)) cua bang cong ((trinh toan) OR (trinh han)) ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho hieu lang - ((hanh tranh) or (hanh trinh)) cua bang cong ((trinh toan) OR (trinh han)) ban~".
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - ((hanh tranh) or (hanh trinh)) cua bang cong ((trinh toan) OR (trinh han)) ban*.