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
ty nang » ky nang, ty xang, ly nang
van cua » vang cua, ban cua, dan cua
ty hang » ty xang, thi hang, thu hang
ve pham » vi pham, v pham, ve phan
ly hang » ly quang
hieu ve » hieu va, hieu van
cua te » cua tu
x hoi » xa hoi, o hoi, x ho

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) or (((ty hang) OR (ly hang)))) x hoi. hieu ve pham duc va doanh van cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: co sach ((ty nang) OR (((ty hang) OR (ly hang)))) x hoi. hieu ve pham duc va doanh van cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "co sach ((ty nang) or (((ty hang) OR (ly hang)))) x hoi. hieu ve pham duc va doanh van cua te".
• Adding a wildcard symbol may retrieve word variants: co sach ((ty nang) or (((ty hang) OR (ly hang)))) x hoi. hieu ve pham duc va doanh van cua te*.