Perhaps you should try some spelling variations:
hanh thai » nhanh thai, hinh thai, anh thai
hanh tai » thanh tai, hang tai, han tai
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
van bao » van ban, van dao
van bac » van ban, van hac, dan bac
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, tuc va, luc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ky nang xa hoi. hieu ((van bac) or (van bao)) xuc va ((hanh thai) OR (hanh tai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky nang xa hoi. hieu ((van bac) OR (van bao)) xuc va ((hanh thai) OR (hanh tai)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ky nang xa hoi. hieu ((van bac) or (van bao)) xuc va ((hanh thai) OR (hanh tai)) cua tre".
• Adding a wildcard symbol may retrieve word variants: so sach ky nang xa hoi. hieu ((van bac) or (van bao)) xuc va ((hanh thai) OR (hanh tai)) cua tre*.