Perhaps you should try some spelling variations:
doanh dao » doanh bao, doanh cao, doanh giao
va doanh » van doanh, vay doanh, va danh
sach ky » sach y, sach ty, sach kem
lang xa » lang ha, dang xay, lang van
cac toc » cac toi, cac nuoc, cac thoi
sac ky » cac ky, sai ky
toc va » hoc va, toc ta, tuc va
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) OR (sac ky)) lang xa hoi. lieu va cac toc va doanh dao ((cua te) OR (cua tu))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ky) OR (sac ky)) lang xa hoi. lieu va cac toc va doanh dao ((cua te) or (cua tu))~".
• Adding a wildcard symbol may retrieve word variants: te ((sach ky) OR (sac ky)) lang xa hoi. lieu va cac toc va doanh dao ((cua te) or (cua tu))*.