Perhaps you should try some spelling variations:
doanh va » doan va, doanh tai, doanh cua
va doanh » van doanh, vay doanh, va danh
tu sach » thu sach, te sach, tu cach
su sach » so sach, vu sach
ty nang » ky nang, ty xang, ty hang
va cua » va chua, via cua, ca cua
v pham » vi pham, d pham
cua te » cua tu
hieu v » hieu va, hieu ve, hieu 2
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: ((tu sach) or (su sach)) ty nang ((ma hoi) or (xa hoi)). hieu v pham duc va doanh va cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ty nang ((ma hoi) OR (xa hoi)). hieu v pham duc va doanh va cua te.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) ty nang ((ma hoi) or (xa hoi)). hieu v pham duc va doanh va cua te*.