Perhaps you should try some spelling variations:
doanh van » doan van, doanh va, doanh ban
te sach » toc sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
cua tre » cuu tre, cua triet, dua tren
ve cac » va cac, vien cac
tuc va » thuc va, truc va, duc va
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: te sach ky nang xa hoi. hieu ve cac ((tuc va) or (tuc xa)) doanh van ((cua tre) OR (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang xa hoi. hieu ve cac ((tuc va) OR (tuc xa)) doanh van ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang xa hoi. hieu ve cac ((tuc va) or (tuc xa)) doanh van ((cua tre) OR (cua te))".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang xa hoi. hieu ve cac ((tuc va) or (tuc xa)) doanh van ((cua tre) OR (cua te))*.