Perhaps you should try some spelling variations:
doanh van » doan van, doanh va, doanh ban
bac truc » bac trung, sach truc, cau truc
va doanh » van doanh, vay doanh, va danh
dang xay » dang van, van xay
hieu van » hieu va, thien van, lieu va
te sach » toc sach
van cua » vang cua, ban cua, dan cua
ba truc » cau truc, ba trung, dai truc
nang xa » nang x, lang xa, nang ma
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: te sach y ((nang xa) or (dang xay)) hoi. hieu van ((bac truc) OR (ba truc)) va doanh van cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y ((nang xa) OR (dang xay)) hoi. hieu van ((bac truc) OR (ba truc)) va doanh van cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y ((nang xa) or (dang xay)) hoi. hieu van ((bac truc) OR (ba truc)) va doanh van cua te*".