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, te sach, tu cach
van cua » vang cua, ban cua, dan cua
vu cham » va cham, vu kham, tu cham
ve cham » va cham, ve chat, ve chim
nang xa » nang x, lang xa, nang ma
ly nang » ky nang, ly hang, ly vang
su sach » so sach, vu sach
cua tre » cua te, cuu tre, cua triet
luc va » duc va, tuc va, loc va

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