Perhaps you should try some spelling variations:
doanh cao » doanh co, doanh bao, doanh cho
hieu van » hieu va, thien van, lieu va
va doanh » van doanh, vay doanh, va danh
lang van » tang van, hoang van, giang van
cac thoi » cac toi, cac hop, cac tro
dang van » hoang van, hang va
te sach » toc sach
cao cua » ca cua, co cua, cau cua
thoi va » hoi va, thai va, tho va
van cac » van hac, van cau, van bac
sach ky » sac ky, sach y, sach ty
lang xa » lang ha, dang xay
cua tu » cua tuc, cua su, cua cu

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 ky ((lang xa) OR (((lang van) OR (dang van)))) hoi. hieu van cac thoi va doanh cao cua tu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky ((lang xa) or (((lang van) OR (dang van)))) hoi. hieu van cac thoi va doanh cao cua tu~".
• Adding a wildcard symbol may retrieve word variants: te sach ky ((lang xa) or (((lang van) OR (dang van)))) hoi. hieu van cac thoi va doanh cao cua tu*.