Perhaps you should try some spelling variations:
cau thuc » cau truc, cuu thuc, can thuc
danh vai » danh sai, danh va, doanh van
so sach » so sanh, bo sach, co sach
ky dang » ky nang
ky danh » ky anh
hieu va » lieu va, hieu qua
thuc va » thuc vat, thuc dan, thuc day
va danh » va dinh, va dan, va hanh
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
va cau » van cau, va cac, va dau

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 ((ky dang) OR (ky danh)) xa hoi. hieu va cau thuc va danh vai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ((ky dang) OR (ky danh)) xa hoi. hieu va cau thuc va danh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: so sach ((ky dang) OR (ky danh)) xa hoi. hieu va cau thuc va danh vai cua tre*.