Perhaps you should try some spelling variations:
ban hanh » ban hang
va thanh » gia thanh, ban thanh, va tinh
te sach » toc sach
nang ma » tang ma, sang ma, nang cao
hoi cua » hoi chuc
sach ky » sac ky, sach y, sach ty
va cao » va cac, va co, va dao
ve cao » ve bao, ve cac, ve co
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky nang ma hoa. hieu ((ve cao) OR (va cao)) duc ((ban hanh) or (va thanh)) hoi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang ma hoa. hieu ((ve cao) OR (va cao)) duc ((ban hanh) OR (va thanh)) hoi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang ma hoa. hieu ((ve cao) OR (va cao)) duc ((ban hanh) or (va thanh)) hoi cua te".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ma hoa. hieu ((ve cao) OR (va cao)) duc ((ban hanh) or (va thanh)) hoi cua te*.