Perhaps you should try some spelling variations:
dang xay » dang van, van xay
cham duc » pham duc, cham soc, pham duy
hanh lai » hanh lam, hanh tai, thanh lap
so sach » so sanh, bo sach, hoc sach
co sach » bo sach, cuon sach, hoc sach
hieu va » lieu va, hieu qua
va cham » va chat, va tham
va hanh » van hanh, va thanh, va danh
lai cua » dai cua, hai cua, lai chau
cua tre » cua te, cuu tre, cua triet

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) OR (co sach)) ky ((nang x) OR (dang xay)) hoi. hieu va cham duc va hanh lai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) OR (co sach)) ky ((nang x) or (dang xay)) hoi. hieu va cham duc va hanh lai cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((so sach) OR (co sach)) ky ((nang x) or (dang xay)) hoi. hieu va cham duc va hanh lai cua tre*.