Perhaps you should try some spelling variations:
doanh ban » doanh bat, doanh nhan, doanh luan
doanh van » doan van, doanh va, doanh nhan
hieu van » hieu va, thien van, lieu va
nang mai » nang ma, nang tai, lang mai
mai hoi » mai khoi, dai hoi, lai hoi
sach ky » sac ky, sach y, sach ty
van cam » van nam, van lam, van cau
sach tu » sach thu, cach tu, sach ty
xuc va » duc va, tuc va, luc 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: thu ((sach ky) or (sach tu)) nang mai hoi. hieu van cam xuc va ((doanh van) OR (doanh ban)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach ky) OR (sach tu)) nang mai hoi. hieu van cam xuc va ((doanh van) OR (doanh ban)) cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((sach ky) or (sach tu)) nang mai hoi. hieu van cam xuc va ((doanh van) OR (doanh ban)) cua te*".