Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
thai cua » than cua, tai cuc, tri cua
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
cac xuc » cam xuc, cac nuoc, chat xuc
tai cua » tai cuc, tri cua, dai cua
xuc va » duc va, tuc va, luc va
va han » va phan, van han, va hanh

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 (toc sach)) ky nang xa hoi. lieu va cac xuc va han ((tai cua) OR (thai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (toc sach)) ky nang xa hoi. lieu va cac xuc va han ((tai cua) OR (thai cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (toc sach)) ky nang xa hoi. lieu va cac xuc va han ((tai cua) OR (thai cua)) tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (toc sach)) ky nang xa hoi. lieu va cac xuc va han ((tai cua) OR (thai cua)) tre*.