Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
cac tac » cac toc, cac bac, cac dac
dan thi » dang thi, tran thi, dinh thi
thi cua » thai cua, thi cuc, tri cua
cua tre » cua te, cuu tre, cua triet
va dan » ca dan, va dao, va dau

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 ky nang xa hoi. hieu va ((cac nuoc) or (cac tac)) va dan thi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang xa hoi. hieu va ((cac nuoc) OR (cac tac)) va dan thi cua tre.
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang xa hoi. hieu va ((cac nuoc) or (cac tac)) va dan thi cua tre*.