Perhaps you should try some spelling variations:
thanh tri » thanh tra, thanh tai, chinh tri
toc sach » hoc sach, doc sach, thuoc sach
cua nuoc » cua quoc, cua nguoi, cua thuoc
tu lang » tu lanh, xu lang, tu quang
cu lang » cua lang, xu lang, chi lang
hieu ve » hieu va, hieu van
vuc van » luc van, thuc van, chuc van
duc van » duc va, duc tan, duc manh
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 ((tu lang) OR (cu lang)) xa hoi. hieu ve cam ((vuc van) or (duc van)) thanh tri cua nuoc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ((tu lang) OR (cu lang)) xa hoi. hieu ve cam ((vuc van) OR (duc van)) thanh tri cua nuoc.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ((tu lang) OR (cu lang)) xa hoi. hieu ve cam ((vuc van) or (duc van)) thanh tri cua nuoc".
• Adding a wildcard symbol may retrieve word variants: toc sach ((tu lang) OR (cu lang)) xa hoi. hieu ve cam ((vuc van) or (duc van)) thanh tri cua nuoc*.