Perhaps you should try some spelling variations:
doanh van » doan van, doanh va, doanh ban
ve chat » va chat, van chat
van cuu » van cau, van chu, van cu
sach ky » sac ky, sach y, sach ty
tu sach » thu sach, su sach, te sach
ve cham » va cham, vu cham, ve chim
nang xa » nang x, lang xa, nang ma
cuu tre » cua tre, cau tren, cau treo
luc va » duc va, loc va
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)) ((luc va) or (tuc va)) doanh van cuu 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)) ((luc va) OR (tuc va)) doanh van cuu 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)) ((luc va) or (tuc va)) doanh van cuu tre*".