Perhaps you should try some spelling variations:
sach van » sach han, sach va, bach van
van nang » van quang, van ban, van dong
ban hanh » ban hang
su triet » su viet, su tien, ve triet
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu van
hieu va » lieu va, hieu qua
van anh » van thanh, tuan anh, van minh
vi su » va su, ve su, ki su

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: tu sach van nang xa hoi. ((hieu ve) OR (hieu va)) cam xuc ((van anh) OR (ban hanh)) vi su triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach van nang xa hoi. ((hieu ve) OR (hieu va)) cam xuc ((van anh) or (ban hanh)) vi su triet~".
• Adding a wildcard symbol may retrieve word variants: tu sach van nang xa hoi. ((hieu ve) OR (hieu va)) cam xuc ((van anh) or (ban hanh)) vi su triet*.