Perhaps you should try some spelling variations:
doanh dao » doanh bao, doanh cao, doanh giao
va doanh » van doanh, vay doanh, va danh
hieu van » hieu va, thien van, lieu va
te sach » toc sach
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
bac toc » bac hoc, bach tuoc, bac tong
sach ky » sac ky, sach y, sach ty
dao cua » dai cua, day cua, dan cua
cac toc » cac nuoc, cac thoi
cac toi » cac thoi
cua te » cua tu

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