Perhaps you should try some spelling variations:
doanh dao » doanh bao, doanh cao, doanh giao
va doanh » van doanh, vay doanh, va danh
cac toc » cac toi, cac nuoc, cac thoi
dao cua » dai cua, day cua, dan cua
tang xa » trang xa, tang ma, lang xa
sach ky » sach y, sach ty, sach kem
hieu va » hieu qua
toc va » hoc va, toc ta, tuc va
cua te » cua tu
sac ky » cac ky, sai ky

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