Perhaps you should try some spelling variations:
cua thuoc » nha thuoc, cay thuoc, cua nuoc
ban hang » ngan hang
sach thu » sach thue, sach thieu, sach tham
cam duc » cam xuc, pham duc, nam duoc
cao duc » dao duc, cao suc, giao duc
sach ty » sach y, sach tu, xach tay
hieu va » lieu va, hieu qua
dang xa » dang xay, lang xa, dang ha
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) or (sach thu)) dang xa hoi. hieu va ((cam duc) or (cao duc)) ban hang va cua thuoc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ty) OR (sach thu)) dang xa hoi. hieu va ((cam duc) OR (cao duc)) ban hang va cua thuoc.
• Adding a wildcard symbol may retrieve word variants: te ((sach ty) or (sach thu)) dang xa hoi. hieu va ((cam duc) or (cao duc)) ban hang va cua thuoc*.