Perhaps you should try some spelling variations:
nam thuc » nam thuoc, am thuc, nam thu
so sach » so sanh, co sach, hoc sach
bo sach » co sach, hoc sach
nang ma » tang ma, sang ma, nang cao
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa
va nam » van nam, ha nam, va nay
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: ((tu cac) or (((so sach) or (bo sach)))) ky nang ma hoi. lieu va nam thuc va hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cac) OR (((so sach) OR (bo sach)))) ky nang ma hoi. lieu va nam thuc va hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu cac) or (((so sach) or (bo sach)))) ky nang ma hoi. lieu va nam thuc va hanh vi cua tre*.