Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
va thanh » gia thanh, ban thanh, va tinh
van hanh » van thanh, ban hanh, van anh
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
cac xuc » cam xuc, chat xuc, cac cuoc
sach ty » sach y, sach tu, sach thu
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
dai cuu » dai cua, dai huu
cuu tre » cua tre, cau tren, cau treo

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

• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ty nang xa hoi. hieu va ((cac xuc) OR (cac nuoc)) ((van hanh) OR (va thanh)) dai cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ty nang xa hoi. hieu va ((cac xuc) OR (cac nuoc)) ((van hanh) or (va thanh)) dai cuu tre~".
• Adding a wildcard symbol may retrieve word variants: toc sach ty nang xa hoi. hieu va ((cac xuc) OR (cac nuoc)) ((van hanh) or (va thanh)) dai cuu tre*.