Perhaps you should try some spelling variations:
cach thuc » anh thuc, cac thu
thuc van » thuc vat, thuc dan, thuc va
van hanh » van thanh, ban hanh, van anh
su sach » so sach, vu sach
so sanh » do sanh
va nang » van nang, da nang, kha nang
va cach » va cac
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: ((su sach) or (so sanh)) ((va nang) OR (cam nang)) ma hoa. lieu va cach thuc van hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sanh)) ((va nang) OR (cam nang)) ma hoa. lieu va cach thuc van hanh vi cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (so sanh)) ((va nang) OR (cam nang)) ma hoa. lieu va cach thuc van hanh vi cua tre*".