Perhaps you should try some spelling variations:
doanh van » doanh va, doanh ban, doanh nhan
doan van » doan va, hoang van, luan van
tang mai » tang ma, tang tai, lang mai
cham xuc » cam xuc, chat xuc, cham soc
va cham » va chat, va tham
hieu va » lieu va, hieu qua
sach ky » sac ky, sach y, sach kem
mai hoi » mai khoi, dai hoi, lai hoi
sach ty » sach y, sach tu, sach thu
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 ty)) tang mai hoi. hieu va cham xuc va ((doanh van) OR (doan van)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach ky) OR (sach ty)) tang mai hoi. hieu va cham xuc va ((doanh van) OR (doan van)) cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((sach ky) or (sach ty)) tang mai hoi. hieu va cham xuc va ((doanh van) OR (doan van)) cua te*".