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
sach ky » sac ky, sach y, sach ty
van cua » vang cua, ban cua, dan cua
vu cham » va cham, vu kham, tu cham
cua tre » cua te, cuu tre, cua triet
ve chat » va chat, van chat
ve cham » va cham, ve chim, viet cham
nang xa » nang x, lang xa, nang ma
tuc va » thuc va, truc va, tuc xa

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