Perhaps you should try some spelling variations:
doanh tang » doanh sang, doanh tong, doanh thanh
sach tru » sach truc, sach tu, sach tren
sach thu » sach thue, sach thieu, sach tham
va doanh » van doanh, vay doanh, va danh
tang cua » mang cua, hang cua, tang luan
nang xa » nang x, lang xa, nang ma
qua cai » qua hai, qua cac, qua ca
cai luc » cau luc, dai luoc
luc va » duc va, tuc va, loc va
cua te » cua tu

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 xa hoi. hieu qua cai luc va doanh tang cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((sach tru) OR (sach thu)) nang xa hoi. hieu qua cai luc va doanh tang cua te.
• Adding a wildcard symbol may retrieve word variants: toc ((sach tru) or (sach thu)) nang xa hoi. hieu qua cai luc va doanh tang cua te*.