Perhaps you should try some spelling variations:
su sach » so sach, vu sach
cao hoi » cau hoi, co hoi, cao hoc
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
ve cam » ve cham, ve cac, ve cai
va cam » va cham, va cac, va cai
va cao » va cac, va co, va dao
vi cua » vai cua, di cua

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 y nang cao hoi. hieu ((((ve cam) or (va cam))) or (va cao)) thuc va hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang cao hoi. hieu ((((ve cam) OR (va cam))) OR (va cao)) thuc va hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach y nang cao hoi. hieu ((((ve cam) or (va cam))) or (va cao)) thuc va hanh vi cua tre*.