Perhaps you should try some spelling variations:
cua thuoc » nha thuoc, cay thuoc, cua nuoc
te sach » toc sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
cao hoi » co hoi, cao hoc, tao hoi
xuc van » duc van, vuc van, xuc ban
luc van » luoc van, luu van, duc van
han tri » han tai, van tri, thanh tri
va cau » van cau, va cac, va dau

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

• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang ((cao hoi) OR (cau hoi)). lieu va cau ((xuc van) OR (luc van)) han tri cua thuoc~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty nang ((cao hoi) or (cau hoi)). lieu va cau ((xuc van) OR (luc van)) han tri cua thuoc~".
• Adding a wildcard symbol may retrieve word variants: te sach ty nang ((cao hoi) or (cau hoi)). lieu va cau ((xuc van) OR (luc van)) han tri cua thuoc*.