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