Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
nang doc » nang luc
va thanh » gia thanh, ban thanh, va tinh
sach ty » sach y, sach tu, sach thu
cac xuc » cam xuc, cac nuoc, chat xuc
nang co » nang cao, nang noi, nang hoc
hieu ve » hieu va, hieu van
ve cac » va cac, vien cac
xuc va » duc va, tuc va, luc va
va dau » va dao
ve du » ve su, te du, va du

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: thuoc sach ty ((nang co) OR (nang doc)) loi. hieu ve cac xuc va thanh ((ve du) OR (va dau)) tren~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach ty ((nang co) OR (nang doc)) loi. hieu ve cac xuc va thanh ((ve du) or (va dau)) tren~".
• Adding a wildcard symbol may retrieve word variants: thuoc sach ty ((nang co) OR (nang doc)) loi. hieu ve cac xuc va thanh ((ve du) or (va dau)) tren*.