Perhaps you should try some spelling variations:
thanh lap » thanh san, phan lap, thanh hai
dang xay » dang van, van xay
hanh lai » hanh lam, hanh tai, thanh loi
so sach » so sanh, bo sach, co sach
va cham » va chat, va tham
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
cuu tre » cua tre, cau tren, cau treo
soc va » hoc va, loc va, doc va

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