Perhaps you should try some spelling variations:
doanh van » doan van, doanh va, doanh ban
sach cap » sach dao, sach bai, sach xa
va doanh » van doanh, vay doanh, va danh
sach cao » sach dao, mach cao, sach bao
van cau » van dau, van hau, van chat
van cua » vang cua, ban cua, dan cua
van cam » van nam, van lam, van dam
tang ma » mang may, tang van
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: te ((sach cao) or (sach cap)) tang ma hoa. thi ((van cam) OR (van cau)) duc va doanh van cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach cao) OR (sach cap)) tang ma hoa. thi ((van cam) OR (van cau)) duc va doanh van cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach cao) or (sach cap)) tang ma hoa. thi ((van cam) OR (van cau)) duc va doanh van cua te".
• Adding a wildcard symbol may retrieve word variants: te ((sach cao) or (sach cap)) tang ma hoa. thi ((van cam) OR (van cau)) duc va doanh van cua te*.