Perhaps you should try some spelling variations:
doanh van » doan van, doanh va, doanh ban
danh vai » danh sai, danh va, dang van
sach ty » sach y, sach thu, xach tay
cam tuc » cam xuc, cam tu, nam thuc
may hoi » may thoi, tay hoi, mai hoi
sach tu » sach thu, cach tu, sach uu
cuu tre » cua tre, cau tren, cau treo
va cam » va cham, va cac, va cao
tuc va » thuc va, truc va, tuc xa

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach ty) OR (sach tu)) mang may hoi. lieu va cam tuc va ((danh vai) or (doanh van)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (sach tu)) mang may hoi. lieu va cam tuc va ((danh vai) OR (doanh van)) cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ty) OR (sach tu)) mang may hoi. lieu va cam tuc va ((danh vai) or (doanh van)) cuu tre".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) OR (sach tu)) mang may hoi. lieu va cam tuc va ((danh vai) or (doanh van)) cuu tre*.