Perhaps you should try some spelling variations:
doc sach » hoc sach, toc sach, nuoc sach
cham tuc » nham thuc, pham thuc, tham thuc
nang xa » nang x, lang xa, nang ma
thi van » thi lan, thi hanh, thi nang
va dinh » van dinh, va kinh, va tinh
dinh cu » dinh cuu, dinh chuc, dinh chau
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
tuc va » thuc va, truc va, tuc xa
cu cua » cau cua, ca cua, co cua

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

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