Perhaps you should try some spelling variations:
cua thuoc » nha thuoc, cay thuoc, cua nuoc
toc sach » hoc sach, doc sach, thuoc sach
hanh tai » thanh tai, hang tai, han tai
xuc van » duc van, vuc van, xuc ban
tai cua » thai cua, tai cuc, tri cua
luc van » luoc van, luu van, duc van
xang xa » lang xa, mang xa, ang xa
tu xang » ty xang, tu lang, tu quang
hieu ve » hieu va, hieu van
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: ((te sach) OR (toc sach)) tu xang xa hoi. hieu ve cam ((xuc van) or (luc van)) hanh tai cua thuoc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) tu xang xa hoi. hieu ve cam ((xuc van) OR (luc van)) hanh tai cua thuoc.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) OR (toc sach)) tu xang xa hoi. hieu ve cam ((xuc van) or (luc van)) hanh tai cua thuoc".
• Adding a wildcard symbol may retrieve word variants: ((te sach) OR (toc sach)) tu xang xa hoi. hieu ve cam ((xuc van) or (luc van)) hanh tai cua thuoc*.