Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
sach ky » sac ky, sach ty, sach kem
nang xa » nang x, lang xa, nang ma
van dau » van dao, phan dau
duc van » duc va, duc tan, duc manh
cuu tre » cua tre, cau tren, cau treo
van ha » van hoa, van chat, van phan
vi cuu » vi luu, vinh cuu

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: te ((sach ky) OR (sach y)) nang xa hoi. hieu ((van ha) OR (van dau)) duc van hanh vi cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ky) OR (sach y)) nang xa hoi. hieu ((van ha) or (van dau)) duc van hanh vi cuu tre~".
• Adding a wildcard symbol may retrieve word variants: te ((sach ky) OR (sach y)) nang xa hoi. hieu ((van ha) or (van dau)) duc van hanh vi cuu tre*.