Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
hoc sach » hoc sinh, hoc cac, hoc anh
thanh ca » thanh cha, thanh cac, thanh ha
sang ma » tang ma, sang tao, mang may
xuc ban » duc ban, cuc ban, quoc ban
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
nang ma » tang ma, nang cao, mang may
bo sach » co sach
ve cam » ve cham, ve cac, va cam
ca cua » co cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc sach) or (bo sach)) ky ((nang ma) OR (sang ma)) hoi. hieu ve cam xuc ban thanh ca cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc sach) OR (bo sach)) ky ((nang ma) OR (sang ma)) hoi. hieu ve cam xuc ban thanh ca cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc sach) or (bo sach)) ky ((nang ma) OR (sang ma)) hoi. hieu ve cam xuc ban thanh ca cua tre*".