Perhaps you should try some spelling variations:
hinh thai » sinh thai, tinh thai, dinh thi
nhanh thi » nhanh thai, nhanh thuc, nhan tai
te sach » toc sach
xuc van » duc van, luc van, vuc van
cua tre » cua te, cuu tre, cua triet
sach ky » sac ky, sach y, sach ty
nang ro » nang co, nang ho, nang ra
va cam » va cham, va cao, va cai
ro hai » co hai, o hai, so hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky nang ro hai. hieu ((va cam) OR (va cac)) xuc van ((nhanh thi) or (hinh thai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang ro hai. hieu ((va cam) OR (va cac)) xuc van ((nhanh thi) OR (hinh thai)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang ro hai. hieu ((va cam) OR (va cac)) xuc van ((nhanh thi) or (hinh thai)) cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ro hai. hieu ((va cam) OR (va cac)) xuc van ((nhanh thi) or (hinh thai)) cua tre*.