Perhaps you should try some spelling variations:
van doanh » toan doanh, van dong, van thanh
toc sach » doc sach, thuoc sach, nuoc sach
hieu van » hieu va, thien van, lieu va
hoc sach » hoc sinh, hoc cac, hoc anh
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
van hac » van hoc, van ha, van hai
hac tri » khac trai, khac thi, tac trai
tri van » thi van, tri va, trinh van
cao cua » ca cua, cau cua, cho cua
co cua » con cua, ca cua, cong cua

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