Perhaps you should try some spelling variations:
cua thuoc » nha thuoc, cay thuoc, cua nuoc
hanh tai » thanh tai, hang tai, han tai
te sach » toc sach
sach tu » sach thu, cach tu, sach ty
tu xang » ty xang, tu lang, tu quang
xang xa » lang xa, mang xa, ang xa
hieu va » lieu va, hieu qua
xuc van » vuc van, xuc ban, thuc van
luc van » luoc van, luu van, luc va
duc van » duc va, duc tan, duc manh
tai cua » thai cua, tai cuc, tri cua
va cam » va cham, va cac, va cao

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 tu xang xa hoi. hieu va cam ((((xuc van) or (luc van))) or (duc van)) hanh tai cua thuoc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach tu xang xa hoi. hieu va cam ((((xuc van) OR (luc van))) OR (duc van)) hanh tai cua thuoc.
• Adding a wildcard symbol may retrieve word variants: te sach tu xang xa hoi. hieu va cam ((((xuc van) or (luc van))) or (duc van)) hanh tai cua thuoc*.