Perhaps you should try some spelling variations:
theo chieu » theo tieu, theo chu, thi chieu
hanh trinh » canh tranh
quan lang » quan hoang, gian lang, quan luan
lang cong » dang cong, bang cong, hang cong
ho chieu » hoc thieu, doi chieu, mot chieu
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((theo chieu) OR (ho chieu)) sach - ((hanh trinh) or (hanh chinh)) quan lang cong san toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (ho chieu)) sach - ((hanh trinh) OR (hanh chinh)) quan lang cong san toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) OR (ho chieu)) sach - ((hanh trinh) or (hanh chinh)) quan lang cong san toan cao".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) OR (ho chieu)) sach - ((hanh trinh) or (hanh chinh)) quan lang cong san toan cao*.