Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trang, lanh tranh
hanh trinh » canh tranh, hanh chinh
chong cong » cong cong, thong cong, cuong cong
cong thanh » dong thanh, cong trinh, cong tan
hoc thieu » toc thieu, hoc hien
cua chong » cua cong, cua chung, cua khong
san lap » sang lap, dan lap, sai lap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((theo tieu) or (hoc thieu)) sach - ((hanh tranh) OR (hanh trinh)) cua chong cong thanh san lap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo tieu) OR (hoc thieu)) sach - ((hanh tranh) OR (hanh trinh)) cua chong cong thanh san lap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo tieu) or (hoc thieu)) sach - ((hanh tranh) OR (hanh trinh)) cua chong cong thanh san lap".
• Adding a wildcard symbol may retrieve word variants: ((theo tieu) or (hoc thieu)) sach - ((hanh tranh) OR (hanh trinh)) cua chong cong thanh san lap*.