Perhaps you should try some spelling variations:
van doanh » toan doanh, van dong, van thanh
doanh van » doan van, doanh va, doanh ban
hieu van » hieu va, thien van, hieu ve
sach dao » lanh dao
sach kho » bach khoa, sach nha, sach kem
chu duc » thu duc, chua duoc, cuu duoc
van cua » vang cua, ban cua, dan cua
duc van » duc va, duc tan, duc manh
tang ma » mang may, tang van
cua cu » cua chu, cua cau, cua su

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 kho) or (sach dao)) tang ma hoa. ((hieu van) or (lieu va)) chu duc van doanh van cua cu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach kho) OR (sach dao)) tang ma hoa. ((hieu van) OR (lieu va)) chu duc van doanh van cua cu.
• Adding a wildcard symbol may retrieve word variants: su ((sach kho) or (sach dao)) tang ma hoa. ((hieu van) or (lieu va)) chu duc van doanh van cua cu*.