Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
quan nhung » cua nhung, luan chung, quang hung
trinh toan » tinh toan, thanh toan, trinh han
doi chieu » doc hieu, doi chi, mot chieu
qua nhung » cua nhung, qua chung, chua nhung
ho chieu » theo chieu, hoc thieu, mot chieu
toan ban » van ban

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 (doi chieu)) sang - canh trinh ((quan nhung) OR (qua nhung)) cong trinh toan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (doi chieu)) sang - canh trinh ((quan nhung) OR (qua nhung)) cong trinh toan ban~".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (doi chieu)) sang - canh trinh ((quan nhung) OR (qua nhung)) cong trinh toan ban*.