Perhaps you should try some spelling variations:
thanh vi » hanh vi, thanh va, thanh ve
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
duc van » duc va, duc manh, duc phan
hanh ve » hanh vi, hanh va, hanh kem
cua tre » cua te, cuu tre, cua triet
ve cac » va cac, vien cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky nang xa hoi. hieu ve cac ((duc tan) or (duc van)) ((thanh vi) or (hanh ve)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang xa hoi. hieu ve cac ((duc tan) OR (duc van)) ((thanh vi) OR (hanh ve)) cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach ky nang xa hoi. hieu ve cac ((duc tan) or (duc van)) ((thanh vi) or (hanh ve)) cua tre*.