Perhaps you should try some spelling variations:
doanh van » doan van, doanh va, doanh ban
va doanh » van doanh, vay doanh, va danh
tu sach » thu sach, su sach, te sach
cua tre » cuu tre, cua triet, dua tren
vu cham » va cham, vu kham, tu cham
sach ky » sac ky, sach y, sach ty
ve cham » va cham, ve chat, ve chim
nang xa » nang x, lang xa, nang ma
tuc va » thuc va, truc va, tuc xa
cua te » cua tu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky nang xa hoi. hieu ((ve cham) or (vu cham)) tuc va doanh van ((cua tre) OR (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang xa hoi. hieu ((ve cham) OR (vu cham)) tuc va doanh van ((cua tre) OR (cua te))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang xa hoi. hieu ((ve cham) or (vu cham)) tuc va doanh van ((cua tre) OR (cua te))*".