Perhaps you should try some spelling variations:
cau thuc » cau truc, cuu thuc, can thuc
vat dinh » va dinh, van dinh, vat sinh
dinh hai » dinh thai, tinh hai, dinh ha
su sach » so sach, vu sach
hai cua » thai cua, dai cua, hoi cua
cua tre » cua te, cuu tre, cua triet
va cau » van cau, va cac, va dau
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) or (vu bach)) ky nang x hoi. lieu va cau thuc vat dinh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu bach)) ky nang x hoi. lieu va cau thuc vat dinh hai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu bach)) ky nang x hoi. lieu va cau thuc vat dinh hai cua tre*.