Perhaps you should try some spelling variations:
ban hanh » ban hang
hanh lai » hanh lam, hanh tai, thanh lap
chau tre » chay tren, chau tho, cho tre
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
van cam » van nam, van lam, van dam
van cau » van dau, van hau, van chat
xuc ban » duc ban, cuc ban, quoc ban
x hoi » xa hoi, o hoi, 5 hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky nang ((x hoi) OR (x ho)). hieu ((van cam) or (van cau)) xuc ban hanh lai chau tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang ((x hoi) OR (x ho)). hieu ((van cam) OR (van cau)) xuc ban hanh lai chau tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang ((x hoi) OR (x ho)). hieu ((van cam) or (van cau)) xuc ban hanh lai chau tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ((x hoi) OR (x ho)). hieu ((van cam) or (van cau)) xuc ban hanh lai chau tre*.