Perhaps you should try some spelling variations:
nuoc sach » nguoi sach, hoc sach, cuoc cach
day thanh » dao thanh, dat thanh, dam thanh
toc sach » hoc sach, doc sach, thuoc sach
da thanh » dao thanh, dat thanh, dam thanh
nang xa » nang x, lang xa, nang ma
doi cua » dai cua, hoi cua
cua tre » cua te, cuu tre, cua triet
va nam » van nam, ha nam, va nay

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 nang xa hoi. lieu va nam thu ((day thanh) OR (da thanh)) doi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (nuoc sach)) ky nang xa hoi. lieu va nam thu ((day thanh) OR (da thanh)) doi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) or (nuoc sach)) ky nang xa hoi. lieu va nam thu ((day thanh) OR (da thanh)) doi cua tre".
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (nuoc sach)) ky nang xa hoi. lieu va nam thu ((day thanh) OR (da thanh)) doi cua tre*.