Perhaps you should try some spelling variations:
doanh dao » doanh bao, doanh cao, doanh giao
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
ta doanh » va doanh, te doanh, ty doanh
hieu van » hieu va, thien van, lieu va
te sach » toc sach
dao cua » dai cua, day cua, dan cua
cac toc » cac toi, cac thoi
sach ky » sac ky, sach y, sach ty
lang ha » long ha
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.

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