Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
thanh vi » hanh vi, thanh va, thanh ve
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cuu tre, cua triet
qua ca » qua cac, qua cua, qua cai
xuc va » tuc va, xac va
luc va » tuc va, loc va
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ky nang xa hoi. hieu qua ca ((((xuc va) OR (luc va))) or (duc va)) thanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang xa hoi. hieu qua ca ((((xuc va) OR (luc va))) OR (duc va)) thanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky nang xa hoi. hieu qua ca ((((xuc va) OR (luc va))) or (duc va)) thanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang xa hoi. hieu qua ca ((((xuc va) OR (luc va))) or (duc va)) thanh vi cua tre*.