Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
thu sach » tu sach, thuat sach, thu hoach
toc sach » hoc sach, doc sach, nuoc sach
cam truc » cau truc, nam truc, lam truoc
nang xa » nang x, lang xa, nang ma
truc va » thuc va, thuc vat, trung va
van tai » von tai, van tuan
tai cua » thai cua, tai cuc, tri cua
cua tre » cua te, cuu tre, cua triet
va cam » va cham, va cac, va cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu sach) or (((toc sach) OR (thuoc sach)))) ky nang xa hoi. lieu va cam truc va van tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (((toc sach) OR (thuoc sach)))) ky nang xa hoi. lieu va cam truc va van tai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) or (((toc sach) OR (thuoc sach)))) ky nang xa hoi. lieu va cam truc va van tai cua tre".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (((toc sach) OR (thuoc sach)))) ky nang xa hoi. lieu va cam truc va van tai cua tre*.