Perhaps you should try some spelling variations:
sang cho » danh cho, dung cho, sang tao
van cau » van hau, van chat, toan cau
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
van dau » van dao, phan dau
so sach » so sanh, bo sach, co sach
nang co » nang cao, nang doc, nang noi
cua tre » cua te, cuu tre, cua triet
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: so sach y ((nang co) or (sang cho)) hoi. hieu ((van cau) OR (van dau)) thuc va hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach y ((nang co) OR (sang cho)) hoi. hieu ((van cau) OR (van dau)) thuc va hanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach y ((nang co) or (sang cho)) hoi. hieu ((van cau) OR (van dau)) thuc va hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: so sach y ((nang co) or (sang cho)) hoi. hieu ((van cau) OR (van dau)) thuc va hanh vi cua tre*.