Perhaps you should try some spelling variations:
cua thuoc » nha thuoc, cay thuoc, cua nuoc
toc sach » hoc sach, doc sach, thuoc sach
hanh tri » thanh tri, hanh tai, hanh trinh
sach ty » sach y, sach tu, sach thu
xang xa » lang xa, mang xa, ang xa
hieu ve » hieu van
hieu va » lieu va, hieu qua
xuc van » duc van, luc van, vuc van
xuc ban » duc ban, cuc ban, quoc ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ty xang xa hoi. ((hieu ve) OR (hieu va)) cam ((xuc van) or (xuc ban)) hanh tri cua thuoc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ty xang xa hoi. ((hieu ve) OR (hieu va)) cam ((xuc van) OR (xuc ban)) hanh tri cua thuoc.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ty xang xa hoi. ((hieu ve) OR (hieu va)) cam ((xuc van) or (xuc ban)) hanh tri cua thuoc".
• Adding a wildcard symbol may retrieve word variants: toc sach ty xang xa hoi. ((hieu ve) OR (hieu va)) cam ((xuc van) or (xuc ban)) hanh tri cua thuoc*.