Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
hieu van » hieu va, thien van, lieu va
hanh hai » nhanh hai, hang hai, hanh tai
so sach » so sanh, bo sach, co sach
cua tre » cua te, cuu tre, cua triet
sach ky » sac ky, sach y, sach ty
van cac » van hac, van cau, van bac
nang xa » nang x, lang xa, nang ma
luc va » duc va, tuc va, loc 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 cac ((luc va) or (hoc va)) ((hanh hai) or (thanh hai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky nang xa hoi. hieu van cac ((luc va) OR (hoc va)) ((hanh hai) OR (thanh hai)) cua tre.
• Adding a wildcard symbol may retrieve word variants: so sach ky nang xa hoi. hieu van cac ((luc va) or (hoc va)) ((hanh hai) or (thanh hai)) cua tre*.