Perhaps you should try some spelling variations:
cua thuoc » nha thuoc, cay thuoc, cua nuoc
toc sach » doc sach, thuoc sach, nuoc sach
hoc sach » hoc sinh, hoc cac, hoc anh
hanh tai » thanh tai, hang tai, han tai
xang xa » lang xa, mang xa, ang xa
hieu ve » hieu va, hieu van
xuc van » duc van, luc van, vuc van
xuc ban » duc ban, cuc ban, quoc ban
tai cua » thai cua, tai cuc, tri cua
ve cam » ve cham, ve cac, va cam

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