Perhaps you should try some spelling variations:
ban hanh » ban hang
su sach » so sach, vu sach
ve cham » va cham, ve chat, vu cham
hanh le » thanh le, hanh ve, hanh de
xuc ban » duc ban, cuc ban, quoc ban
cuu tre » cua tre, cau tren, cau treo
sach ky » sac ky, sach y, sach ty
ve cam » ve cac, va cam, ve cai
le cuu » le cua, le huu, le cau
x hoi » o hoi, x ho, 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: su sach ky nang ((x hoi) or (xa hoi)). hieu ((ve cam) OR (ve cham)) xuc ban hanh le cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang ((x hoi) OR (xa hoi)). hieu ((ve cam) OR (ve cham)) xuc ban hanh le cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang ((x hoi) or (xa hoi)). hieu ((ve cam) OR (ve cham)) xuc ban hanh le cuu tre".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang ((x hoi) or (xa hoi)). hieu ((ve cam) OR (ve cham)) xuc ban hanh le cuu tre*.