Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh va » thanh van, hanh va, thanh ha
so sanh » do sanh
sanh ky » hanh ky, sang ky, nganh ky
nang ma » tang ma, sang ma, nang cao
tuc ban » thuc ban, truc ban, tu ban
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa
ve cam » ve cham, ve cac, ve cai
va cam » va cham, va cac, va cao
va cua » va chua, via cua, ca 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 sanh ky nang ma hoi. hieu ((ve cam) OR (va cam)) tuc ban thanh va cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sanh ky nang ma hoi. hieu ((ve cam) OR (va cam)) tuc ban thanh va cua tre".
• Adding a wildcard symbol may retrieve word variants: so sanh ky nang ma hoi. hieu ((ve cam) OR (va cam)) tuc ban thanh va cua tre*.