Perhaps you should try some spelling variations:
doanh van » doan van, doanh va, doanh ban
ve cham » va cham, ve chat, vu cham
van cua » vang cua, ban cua, dan cua
sach ky » sac ky, sach ty, sach kem
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cuu tre, cua triet
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) OR (sach y)) nang xa hoi. hieu ve cham ((luc va) or (tuc va)) doanh van cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sach y)) nang xa hoi. hieu ve cham ((luc va) OR (tuc va)) doanh van cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) OR (sach y)) nang xa hoi. hieu ve cham ((luc va) or (tuc va)) doanh van cua tre*".