Perhaps you should try some spelling variations:
vay doanh » van doanh, ly doanh, voi doanh
nhan thuc » nhan luc, dan thuc, toan thuc
doanh van » doan van, doanh va, doanh ban
thu sach » thuat sach, thuoc sach, thu hoach
thuc vay » thuc vat, thuc day, thuc va
tu sach » su sach, te sach, tu cach
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
va nhan » van nhan, ca nhan, va phan
van cuu » van cau, van chu, van cu
cuu tre » cua tre, cau tren, cau treo
ma hoi » mai hoi, xa hoi, ma hoa

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 (thu sach)) ky nang ma hoi. hieu va nhan thuc vay doanh van cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ky nang ma hoi. hieu va nhan thuc vay doanh van cuu tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) ky nang ma hoi. hieu va nhan thuc vay doanh van cuu tre*.