Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
sach thu » sach thue, sach thieu, sach tham
van hanh » ban hanh, van anh, van ban
vu sach » vu bach, su sach, vu khach
nang xa » lang xa, nang ma, mang xa
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: vu sach thu ((nang xa) OR (nang x)) hoi. hieu qua cam xuc ((van hanh) OR (van thanh)) vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach thu ((nang xa) OR (nang x)) hoi. hieu qua cam xuc ((van hanh) or (van thanh)) vi cua tre~".
• Adding a wildcard symbol may retrieve word variants: vu sach thu ((nang xa) OR (nang x)) hoi. hieu qua cam xuc ((van hanh) or (van thanh)) vi cua tre*.