Perhaps you should try some spelling variations:
nhanh thi » nhanh thai, nhanh thuc, nhan tai
hinh thai » sinh thai, tinh thai, dinh thi
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
xuc van » duc van, luc van, vuc van
cua tre » cua te, cuu tre, cua triet
nang o » nang co, nang ho, nang ro
ve cam » ve cham, ve cac, va cam
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: tu sach ky nang o hai. hieu ve cam xuc van ((nhanh thi) or (hinh thai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang o hai. hieu ve cam xuc van ((nhanh thi) OR (hinh thai)) cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang o hai. hieu ve cam xuc van ((nhanh thi) or (hinh thai)) cua tre*.