Perhaps you should try some spelling variations:
nhanh hai » nhanh thai, thanh hai, nhanh ha
hieu van » hieu va, thien van, lieu va
hanh hai » thanh hai, hang hai, hanh tai
su sach » so sach, vu sach
cua tre » cua te, cuu tre, cua triet
sach ky » sac ky, sach y, sach ty
cac tuc » cac toc, cac tac, cac nuoc
cac tu » cac thu, cach tu, cac du
x hoi » xa hoi, o hoi, x ho

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

• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang x hoi. hieu van ((cac tuc) OR (cac tu)) xa ((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 van ((cac tuc) OR (cac tu)) xa ((hanh hai) or (nhanh hai)) cua tre~".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang x hoi. hieu van ((cac tuc) OR (cac tu)) xa ((hanh hai) or (nhanh hai)) cua tre*.