Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
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, va dan, va hanh
lai cua » hai cua, lai chau, thai cua
xuc va » duc va, tuc va, luc va
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 ((lai cua) OR (dai cua)) 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 ((lai cua) OR (dai cua)) tre".
• Adding a wildcard symbol may retrieve word variants: toc sach ky nang x hoi. hieu va cac xuc va danh ((lai cua) OR (dai cua)) tre*.