Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
quoc ban » quoc bao, quoc lan, quoc quan
xuat ban » luat ban, xuat san, thuat ban
bach van » bach dan, cach van, bach dang
tu bach » vu bach, tu cach, tu bac
lang xa » dang xay, lang van
lang ha » long ha
hieu ve » hieu va, hieu van
ve cam » ve cham, ve cac, va cam
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 bach van ((lang xa) OR (lang ha)) hoi. hieu ve cam ((xuat ban) OR (quoc ban)) hanh vi su triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu bach van ((lang xa) OR (lang ha)) hoi. hieu ve cam ((xuat ban) or (quoc ban)) hanh vi su triet~".
• Adding a wildcard symbol may retrieve word variants: tu bach van ((lang xa) OR (lang ha)) hoi. hieu ve cam ((xuat ban) or (quoc ban)) hanh vi su triet*.