Perhaps you should try some spelling variations:
sach tin » sach tien, sach kinh, sach tren
tin mang » tin nang, ninh mang, tien manh
cua nuoc » cua nguoi, cua thuoc, nha nuoc
cua quoc » cua thuoc
te sach » toc sach
mang xa » lang xa, mang may, dang xay
hieu ve » hieu va, hieu van
xuc van » luc van, vuc van, xuc ban
duc van » duc va, duc tan, duc manh
anh tai » hanh tai, anh thai, vanh tai
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 tin mang xa hoi. hieu ve cam ((xuc van) or (duc van)) anh tai ((cua nuoc) OR (cua quoc))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach tin mang xa hoi. hieu ve cam ((xuc van) OR (duc van)) anh tai ((cua nuoc) OR (cua quoc)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach tin mang xa hoi. hieu ve cam ((xuc van) or (duc van)) anh tai ((cua nuoc) OR (cua quoc))".
• Adding a wildcard symbol may retrieve word variants: te sach tin mang xa hoi. hieu ve cam ((xuc van) or (duc van)) anh tai ((cua nuoc) OR (cua quoc))*.