Perhaps you should try some spelling variations:
doc sach » hoc sach, toc sach, nuoc sach
cham tuc » nham thuc, pham thuc, tham thuc
dinh cuu » dinh chi
nang xa » nang x, lang xa, nang ma
thi van » thi lan, thi hanh, thi nang
dinh cu » dinh chuc, dinh chau, dinh chi
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
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: doc sach y nang xa hoi. ((thien van) or (thi van)) cham tuc va ((dinh cu) OR (dinh cuu)) 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) OR (dinh cuu)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc sach y nang xa hoi. ((thien van) or (thi van)) cham tuc va ((dinh cu) OR (dinh cuu)) 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) OR (dinh cuu)) cua tre*.