Perhaps you should try some spelling variations:
doanh mang » doanh sang, doanh quang, doanh ban
sach kho » bach khoa, sach dao, sach nha
kho mang » kho tang, cho mang, pho mang
mang cua » manh cua, dung cua, ban cua
tu sach » thu sach, su sach, te sach
truc va » thuc va, thuc vat, trung va
may hoa » may khoa, ma hoa, day hoa
hieu ve » hieu va, hieu van
cua tuc » cua duc, cua tu, cua thuoc
xuc va » duc va, tuc va, luc va

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 kho mang may hoa. ((hieu ve) or (hieu qua)) cam ((xuc va) or (truc va)) doanh mang cua tuc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach kho mang may hoa. ((hieu ve) OR (hieu qua)) cam ((xuc va) OR (truc va)) doanh mang cua tuc.
• Adding a wildcard symbol may retrieve word variants: tu sach kho mang may hoa. ((hieu ve) or (hieu qua)) cam ((xuc va) or (truc va)) doanh mang cua tuc*.