Perhaps you should try some spelling variations:
lap thuc » tap thuc, luan thuc, phap thuc
va thanh » gia thanh, ban thanh, le thanh
tu sach » thu sach, su sach, te sach
va tinh » may tinh
cua tre » cua te, cuu tre, cua triet
nang ma » tang ma, sang ma, nang cao
hieu va » hieu qua
sach 2 » sach y
ma hoi » mai hoi, xa hoi, ma hoa
2 nang » v nang
de cua » le cua, te cua, dieu cua

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: tu sach 2 nang ma hoi. ((hieu va) OR (lieu va)) lap thuc ((va thanh) OR (va tinh)) de cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach 2 nang ma hoi. ((hieu va) OR (lieu va)) lap thuc ((va thanh) or (va tinh)) de cua tre~".
• Adding a wildcard symbol may retrieve word variants: tu sach 2 nang ma hoi. ((hieu va) OR (lieu va)) lap thuc ((va thanh) or (va tinh)) de cua tre*.