Perhaps you should try some spelling variations:
doanh van » doan van, doanh va, doanh ban
va doanh » van doanh, vay doanh, va danh
co sach » bo sach, cuon sach, hoc sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
ve pham » vi pham, v pham, ve phat
ve phan » va phan, ke phan, ve phat
van cua » vang cua, ban cua, dan cua
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: co sach ty nang x ho. hieu ((ve pham) OR (ve phan)) duc va doanh van cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "co sach ty nang x ho. hieu ((ve pham) OR (ve phan)) duc va doanh van cua te".
• Adding a wildcard symbol may retrieve word variants: co sach ty nang x ho. hieu ((ve pham) OR (ve phan)) duc va doanh van cua te*.