Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
sach tay » xach tay, sach hay, sach nay
tay lang » tai lang, tay tang, tay quang
nang hoi » nang noi, nang hoc, nang ho
cac thoi » cac toi, cac hop, cac tro
xa nang » da nang, va nang, xa nong
cac toc » cac toi, cac nuoc
te sach » toc sach
cac tuc » cac tu, cac tac, cac nuoc
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
hoi su » hoi suc, khoi su, thoi 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: te sach tay lang xa hoi. hieu ve ((cac tuc) OR (((cac toc) OR (cac thoi)))) xa nang hoi su triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach tay lang xa hoi. hieu ve ((cac tuc) or (((cac toc) OR (cac thoi)))) xa nang hoi su triet~".
• Adding a wildcard symbol may retrieve word variants: te sach tay lang xa hoi. hieu ve ((cac tuc) or (((cac toc) OR (cac thoi)))) xa nang hoi su triet*.