Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
bach dan » bach dang, bac dan, bach van
ban hang » ngan hang
cac quoc » cac nuoc, cac cuoc, cao quoc
tu bach » vu bach, tu cach, tu bac
hieu ve » hieu va, hieu van
nang xa » lang xa, nang ma, mang xa
ve cac » va cac, vien cac
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 dan ((nang xa) OR (nang x)) hoi. hieu ve cac quoc ((ban hanh) OR (ban hang)) vi su triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu bach dan ((nang xa) OR (nang x)) hoi. hieu ve cac quoc ((ban hanh) or (ban hang)) vi su triet~".
• Adding a wildcard symbol may retrieve word variants: tu bach dan ((nang xa) OR (nang x)) hoi. hieu ve cac quoc ((ban hanh) or (ban hang)) vi su triet*.