Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
hoc sach » hoc sinh, hoc cac, hoc anh
nhan tai » hang tai, van tai, toan tai
tu sach » su sach, te sach, tu cach
nang xa » nang x, lang xa, nang ma
cam tuc » cam xuc, cam tu, nam thuc
va nhan » van nhan, ca nhan, va phan
tai cua » thai cua, tai cuc, tri cua
cua tre » cua te, cuu tre, cua triet
va cam » va cham, va cac, va cao
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: ((((thu sach) OR (tu sach))) or (hoc sach)) ky nang xa hoi. lieu va cam tuc va nhan tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((thu sach) OR (tu sach))) OR (hoc sach)) ky nang xa hoi. lieu va cam tuc va nhan tai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((thu sach) OR (tu sach))) or (hoc sach)) ky nang xa hoi. lieu va cam tuc va nhan tai cua tre".
• Adding a wildcard symbol may retrieve word variants: ((((thu sach) OR (tu sach))) or (hoc sach)) ky nang xa hoi. lieu va cam tuc va nhan tai cua tre*.