Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
bach tuoc » sach duoc, sach nuoc
van bach » van bac, van hach, van sach
tuoc van » luoc van, quoc van, thuoc von
van dang » van dong, van dung, van nang
dang tri » dang thi, dung tri, dong tri
nang xa » nang x, lang xa, mang xa
nang ma » tang ma, sang ma, nang cao
thi van » thi lan, thi hanh, thi nang
cua tre » cua te, cuu tre, cua triet

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 y ((nang xa) OR (nang ma)) hoi. thi van bach tuoc van dang tri cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach y ((nang xa) OR (nang ma)) hoi. thi van bach tuoc van dang tri cua tre".
• Adding a wildcard symbol may retrieve word variants: thuoc sach y ((nang xa) OR (nang ma)) hoi. thi van bach tuoc van dang tri cua tre*.