Perhaps you should try some spelling variations:
doanh van » doan van, doanh va, doanh ban
dang lap » dan lap, dung lap, sang lap
danh vai » danh sai, danh va, dang van
lap hai » lap tai, lap lai, lap hoat
hieu ve » hieu va, hieu van
sach ky » sac ky, sach ty, sach kem
cam luc » cam xuc, cau luc
ve cam » ve cham, ve cac, va cam
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: su ((sach ky) or (sach y)) dang lap hai. hieu ve cam luc va ((danh vai) OR (doanh van)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ky) OR (sach y)) dang lap hai. hieu ve cam luc va ((danh vai) OR (doanh van)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ky) or (sach y)) dang lap hai. hieu ve cam luc va ((danh vai) OR (doanh van)) cua te".
• Adding a wildcard symbol may retrieve word variants: su ((sach ky) or (sach y)) dang lap hai. hieu ve cam luc va ((danh vai) OR (doanh van)) cua te*.