Perhaps you should try some spelling variations:
nhanh thai » nhanh thi, nhanh thanh, nhanh thang
hanh thai » hinh thai, hanh tai, anh thai
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
su sach » so sach, vu sach
cua tre » cua te, cuu tre, cua triet
sach ky » sac ky, sach y, sach ty
cac xuc » cam xuc, chat xuc, cac cuoc
hieu ve » hieu va, hieu van
nang o » nang co, nang ho, nang ro
o hai » co hai, so hai, o lai

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 o hai. hieu ve ((cac xuc) OR (cac nuoc)) ban ((hanh thai) or (nhanh thai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang o hai. hieu ve ((cac xuc) OR (cac nuoc)) ban ((hanh thai) OR (nhanh thai)) cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang o hai. hieu ve ((cac xuc) OR (cac nuoc)) ban ((hanh thai) or (nhanh thai)) cua tre*".