Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
danh vai » danh sai, doanh van, dang van
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
cam duc » cam xuc, cao duc, pham duc
danh va » doanh va, hanh va, anh va
cua tre » cua te, cuu tre, cua triet

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

• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ty nang xa hoi. ((lieu va) OR (hieu qua)) cam duc va ((danh vai) OR (danh va)) cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ty nang xa hoi. ((lieu va) or (hieu qua)) cam duc va ((danh vai) OR (danh va)) cua tre~".
• Adding a wildcard symbol may retrieve word variants: thu sach ty nang xa hoi. ((lieu va) or (hieu qua)) cam duc va ((danh vai) OR (danh va)) cua tre*.