Perhaps you should try some spelling variations:
nha thuoc » nha nuoc, nhan thuc, nha hoc
hanh tai » thanh tai, hang tai, han tai
te sach » toc sach
tu xang » ty xang, tu quang, tct xang
tu lang » cu lang, tu lanh, xu lang
hieu ve » hieu va, hieu van
xuc van » luc van, vuc van, xuc ban
duc van » duc va, duc tan, duc manh
tai nha » tai ha, tai ngan, tai khoa
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 ((tu xang) OR (tu lang)) xa hoi. hieu ve cam ((xuc van) or (duc van)) hanh tai nha thuoc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((tu xang) OR (tu lang)) xa hoi. hieu ve cam ((xuc van) OR (duc van)) hanh tai nha thuoc.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((tu xang) OR (tu lang)) xa hoi. hieu ve cam ((xuc van) or (duc van)) hanh tai nha thuoc".
• Adding a wildcard symbol may retrieve word variants: te sach ((tu xang) OR (tu lang)) xa hoi. hieu ve cam ((xuc van) or (duc van)) hanh tai nha thuoc*.