Perhaps you should try some spelling variations:
hanh tai » thanh tai, hang tai, han tai
toc sach » hoc sach, doc sach, thuoc sach
hieu va » lieu va, hieu qua
tai cua » thai cua, tai cuc, tri cua
va hanh » van hanh, va thanh, va danh
cau luc » cau truc, cau phuc
tu sach » thu sach, te sach, tu cach
nang xa » nang x, lang xa, nang ma
su sach » so sach, vu sach
cua tre » cua te, cuu tre, cua triet
va cau » van cau, va cac, va dau
luc va » duc va, tuc va, loc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((((tu sach) or (su sach))) or (toc sach)) ky nang xa hoi. hieu va cau luc va hanh tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((tu sach) OR (su sach))) OR (toc sach)) ky nang xa hoi. hieu va cau luc va hanh tai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((((tu sach) or (su sach))) or (toc sach)) ky nang xa hoi. hieu va cau luc va hanh tai cua tre*.