Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
van tuan » van quan, van ban, anh tuan
sach ky » sac ky, sach y, sach kem
sach ty » sach y, sach tu, sach thu
nang xa » nang x, lang xa, nang ma
qua cam » qua cham, qua cac, qua ca
cua tre » cua te, cuu tre, cua triet
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: su ((sach ky) OR (sach ty)) nang xa hoi. hieu qua cam xuc ((van hanh) OR (van tuan)) vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ky) OR (sach ty)) nang xa hoi. hieu qua cam xuc ((van hanh) or (van tuan)) vi cua tre~".
• Adding a wildcard symbol may retrieve word variants: su ((sach ky) OR (sach ty)) nang xa hoi. hieu qua cam xuc ((van hanh) or (van tuan)) vi cua tre*.