Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
thuc xay » thuc day, tuc xay, thuat xay
danh dau » lanh dao, hang dau, danh tu
sach ky » sac ky, sach y, sach ty
thuc xa » tuc xa, thuc va, thuc ha
tang xa » trang xa, tang ma, lang xa
ky tang » ky nang, ky dang, kho tang
dau cua » dai cua, day cua, cau cua
cua tre » cua te, cuu tre, cua triet
he nam » nghe nam

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 ky tang xa hoi. hieu ((he nam) or (ha nam)) ((thuc xa) OR (thuc xay)) danh dau cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ky tang xa hoi. hieu ((he nam) OR (ha nam)) ((thuc xa) OR (thuc xay)) danh dau cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach ky tang xa hoi. hieu ((he nam) or (ha nam)) ((thuc xa) OR (thuc xay)) danh dau cua tre".
• Adding a wildcard symbol may retrieve word variants: thuoc sach ky tang xa hoi. hieu ((he nam) or (ha nam)) ((thuc xa) OR (thuc xay)) danh dau cua tre*.