Perhaps you should try some spelling variations:
nuoc sach » nguoi sach, hoc sach, cuoc cach
toc sach » hoc sach, doc sach, thuoc sach
dinh dau » dinh dat, dinh du, danh dau
cham tuc » nham thuc, pham thuc, tham thuc
thi lan » thi hanh, thi nang, thi lien
dau cua » dai cua, day cua, cau cua
va dinh » van dinh, va kinh, va tinh
cua tre » cua te, cuu tre, cua triet
thi van » thi hanh, thi nang
tang xa » trang xa, tang ma, lang xa
ky tang » ky nang, ky dang, kho tang
tuc va » thuc va, truc va, tuc xa

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((toc sach) or (nuoc sach)) ky tang xa hoi. ((thi van) or (thi lan)) cham tuc va dinh dau cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (nuoc sach)) ky tang xa hoi. ((thi van) OR (thi lan)) cham tuc va dinh dau cua tre.
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (nuoc sach)) ky tang xa hoi. ((thi van) or (thi lan)) cham tuc va dinh dau cua tre*.