Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
chau tre » chay tren, chau tho, cho tre
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
cac xuc » cam xuc, cac nuoc, chat xuc
va danh » va dinh, dia danh, va thanh
va hanh » van hanh, va thanh, ban hanh
va dan » ca dan, va dao, va dau
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ky nang x hoi. hieu va cac xuc ((((va danh) OR (va hanh))) or (va dan)) lai chau tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ky nang x hoi. hieu va cac xuc ((((va danh) OR (va hanh))) OR (va dan)) lai chau tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ky nang x hoi. hieu va cac xuc ((((va danh) OR (va hanh))) or (va dan)) lai chau tre".
• Adding a wildcard symbol may retrieve word variants: toc sach ky nang x hoi. hieu va cac xuc ((((va danh) OR (va hanh))) or (va dan)) lai chau tre*.