Perhaps you should try some spelling variations:
cua thuoc » nha thuoc, cay thuoc, cua nuoc
ban hanh » ban hang
hanh va » hang va, hanh vi
cao duc » dao duc, cao suc, giao duc
sach ty » sach y, sach tu, sach thu
te sach » toc sach
hieu ve » hieu va, hieu van
mang xa » lang xa, dang xay, mang cua
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: te sach ty ((mang xa) or (mang may)) hoi. hieu ve ((pham duc) or (cao duc)) ban hanh va cua thuoc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty ((mang xa) OR (mang may)) hoi. hieu ve ((pham duc) OR (cao duc)) ban hanh va cua thuoc.
• Adding a wildcard symbol may retrieve word variants: te sach ty ((mang xa) or (mang may)) hoi. hieu ve ((pham duc) or (cao duc)) ban hanh va cua thuoc*.