Perhaps you should try some spelling variations:
doanh dan » doanh ban, doanh van, doanh dao
va doanh » van doanh, vay doanh, va danh
hieu van » thien van, lieu va, hieu ve
te sach » toc sach
cac toc » cac toi, cac nuoc, cac thoi
dan cua » dan ca, ban cua, dai cua
hieu va » lieu va, hieu qua
lang ha » long ha
sach ky » sac ky, sach y, sach ty
ky lang » ky nang, ky dang, ky tang
ha hoi » hoa hoi, ha noi, xa hoi
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 ha hoi. ((hieu van) OR (hieu va)) ((cac toc) OR (cac tro)) va doanh dan cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky lang ha hoi. ((hieu van) OR (hieu va)) ((cac toc) or (cac tro)) va doanh dan cua te~".
• Adding a wildcard symbol may retrieve word variants: te sach ky lang ha hoi. ((hieu van) OR (hieu va)) ((cac toc) or (cac tro)) va doanh dan cua te*.