Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
cong hang » cong thang, cong hung, cong lang
theo thu » theo chu, theo tu, thi thu
cua tong » cua cong, cua nong, cua song
cua dong » chua dong, cua cong, cua dang
hang ban » hang luan, hang va, hang tai
ban hang » ngan hang

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((theo thu) or (theo tieu)) sach - hanh tranh ((cua tong) or (cua dong)) cong hang ban hang~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo thu) OR (theo tieu)) sach - hanh tranh ((cua tong) OR (cua dong)) cong hang ban hang.
• Adding a wildcard symbol may retrieve word variants: ((theo thu) or (theo tieu)) sach - hanh tranh ((cua tong) or (cua dong)) cong hang ban hang*.