Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
hanh lai » hanh lam, hanh tai, thanh lap
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
hieu va » lieu va, hieu qua
lai cua » dai cua, hai cua, lai chau
cua tre » cua te, cuu tre, cua triet
lao va » cao va, bao va, dao va
x hoi » xa hoi, o hoi, x ho
lo va » lo van, ly va, le va

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc sach ty nang x hoi. hieu va cac ((lo va) or (((lao va) or (tao va)))) hanh lai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ty nang x hoi. hieu va cac ((lo va) OR (((lao va) OR (tao va)))) hanh lai cua tre.
• Adding a wildcard symbol may retrieve word variants: thuoc sach ty nang x hoi. hieu va cac ((lo va) or (((lao va) or (tao va)))) hanh lai cua tre*.