Perhaps you should try some spelling variations:
chay tren » thai tren, ca tren, cau tren
ban hanh » ban hang
hanh lai » hanh lam, hanh tai, thanh lap
lai chay » lai chau, lam chay, lai chang
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, x ho

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. hieu ((van cam) or (van cau)) xuc ban hanh lai chay tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang x hoi. hieu ((van cam) OR (van cau)) xuc ban hanh lai chay tren.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang x hoi. hieu ((van cam) or (van cau)) xuc ban hanh lai chay tren*.