Perhaps you should try some spelling variations:
doanh van » doan van, doanh va, doanh ban
va doanh » van doanh, vay doanh, va danh
te sach » toc sach
hieu va » lieu va, hieu qua
van cua » vang cua, ban cua, dan cua
hieu ve » hieu van
sach ky » sac ky, sach y, sach ty
cam duc » cam xuc, cao duc, pham duc
cua te » cua tu
ma hoi » mai hoi, ma hoa, me hoi

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 ky nang ((ma hoi) or (xa hoi)). ((hieu ve) OR (hieu va)) cam duc va doanh van cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang ((ma hoi) OR (xa hoi)). ((hieu ve) OR (hieu va)) cam duc va doanh van cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang ((ma hoi) or (xa hoi)). ((hieu ve) OR (hieu va)) cam duc va doanh van cua te*".