Perhaps you should try some spelling variations:
nhanh hai » nhanh thai, nhanh ha, nganh hai
thanh hai » thanh phan, thanh hoa, thanh san
hanh hai » hang hai, hanh tai, lanh hai
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
qua cac » cua cac
cac luc » cau luc, coc luc, cac nuoc
cua tre » cua te, cuu tre, cua triet
luc va » duc va, tuc va, loc va
x hoi » xa hoi, o hoi, x ho

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 x hoi. hieu qua cac luc va ((hanh hai) or (((nhanh hai) OR (thanh hai)))) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang x hoi. hieu qua cac luc va ((hanh hai) OR (((nhanh hai) OR (thanh hai)))) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang x hoi. hieu qua cac luc va ((hanh hai) or (((nhanh hai) OR (thanh hai)))) cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang x hoi. hieu qua cac luc va ((hanh hai) or (((nhanh hai) OR (thanh hai)))) cua tre*.