Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trang, lanh tranh
hanh trinh » canh tranh, hanh chinh
thi chieu » thi chien, thi hieu, theo chieu
cong cong » cong dong, trong cong, dung cong
ho chieu » theo chieu, hoc thieu, doi chieu
cong tap » cuong tap, cong tac, cong tan
tap toan » tap doan, tap quan, bai toan
toan ban » van ban

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 (thi chieu)) sach - ((hanh tranh) OR (hanh trinh)) cua cong cong tap toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (thi chieu)) sach - ((hanh tranh) OR (hanh trinh)) cua cong cong tap toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (thi chieu)) sach - ((hanh tranh) OR (hanh trinh)) cua cong cong tap toan ban".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (thi chieu)) sach - ((hanh tranh) OR (hanh trinh)) cua cong cong tap toan ban*.