Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
van hanh » ban hanh, van anh, van ban
sach ty » sach tu, sach thu, xach tay
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cuu tre, cua triet
qua ca » qua cac, qua cua, qua cai
ca xuc » cam xuc, chat xuc
vi cua » vai cua, di cua

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: vu ((sach ty) OR (sach y)) nang xa hoi. hieu qua ca xuc ((van hanh) OR (van thanh)) vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu ((sach ty) OR (sach y)) nang xa hoi. hieu qua ca xuc ((van hanh) or (van thanh)) vi cua tre~".
• Adding a wildcard symbol may retrieve word variants: vu ((sach ty) OR (sach y)) nang xa hoi. hieu qua ca xuc ((van hanh) or (van thanh)) vi cua tre*.