Perhaps you should try some spelling variations:
so sach » so sanh, bo sach, co sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
hieu ve » hieu va, hieu van
ve pham » vi pham, v pham, ve phan
va danh » va dinh, va dan, va hanh
danh ca » dan ca, doanh cua, danh cho
ca cua » co cua
cua te » cua tu
x hoi » xa hoi, o hoi, 5 hoi

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

• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ty nang ((x hoi) OR (x ho)). hieu ve pham duc va danh ca cua te~.
• Adding a wildcard symbol may retrieve word variants: so sach ty nang ((x hoi) or (x ho)). hieu ve pham duc va danh ca cua te*.