Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
doi chieu » doc hieu, doi chi, mot chieu
ho chieu » theo chieu, hoc thieu, mot chieu
van manh » van minh, van anh, van hanh
qua dung » quang dung, su dung, qua song
trong ca » trong cac, trong nha
toan ban » van ban
ca toan » cua toan, va toan, bai toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chieu) or (doi chieu)) xanh - ((van manh) or (hanh trinh)) qua dung trong ca toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (doi chieu)) xanh - ((van manh) OR (hanh trinh)) qua dung trong ca toan ban.
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (doi chieu)) xanh - ((van manh) or (hanh trinh)) qua dung trong ca toan ban*.