Perhaps you should try some spelling variations:
doanh van » doan van, doanh va, doanh ban
sach tru » sach truc, sach tu, sach tren
sach thu » sach thue, sach thieu, sach tham
va doanh » van doanh, vay doanh, va danh
qua cac » cua cac
cac luc » cau luc, coc luc, cac nuoc
van cua » vang cua, ban cua, dan cua
luc va » duc va, tuc va, loc va
cua te » cua tu
x hoi » xa hoi, o hoi, x ho

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: toc ((sach tru) or (sach thu)) nang x hoi. hieu qua cac luc va doanh van cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((sach tru) OR (sach thu)) nang x hoi. hieu qua cac luc va doanh van cua te.
• Adding a wildcard symbol may retrieve word variants: toc ((sach tru) or (sach thu)) nang x hoi. hieu qua cac luc va doanh van cua te*.