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