Perhaps you should try some spelling variations:
nhanh hai » nhanh thai, thanh hai, nhanh ha
hanh hai » thanh hai, hang hai, hanh tai
su sach » so sach, vu sach
cac xuc » cam xuc, cac nuoc, chat xuc
sach ky » sac ky, sach y, sach ty
hieu va » lieu va
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, tuc va, luc 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 va) OR (hieu qua)) cac xuc va ((hanh hai) or (nhanh hai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang x hoi. ((hieu va) OR (hieu qua)) cac xuc va ((hanh hai) OR (nhanh hai)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang x hoi. ((hieu va) OR (hieu qua)) cac xuc va ((hanh hai) or (nhanh hai)) cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang x hoi. ((hieu va) OR (hieu qua)) cac xuc va ((hanh hai) or (nhanh hai)) cua tre*.