Perhaps you should try some spelling variations:
doanh tri » doanh tai, doanh tren, dinh tri
va doanh » van doanh, vay doanh, va danh
sach ky » sac ky, sach ty, sach kem
thuc va » thuc vat, thuc dan, thuc day
hieu va » lieu va, hieu qua
nang co » nang cao, nang doc, nang noi
nang ho » nang hoc, tang ho, nang cao
cua te » cua tu
va am » va lam, va cam

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((sach ky) OR (sach y)) ((nang ho) or (nang co)) hoi. hieu va am thuc va doanh tri cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((sach ky) OR (sach y)) ((nang ho) OR (nang co)) hoi. hieu va am thuc va doanh tri cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((sach ky) OR (sach y)) ((nang ho) or (nang co)) hoi. hieu va am thuc va doanh tri cua te".
• Adding a wildcard symbol may retrieve word variants: doc ((sach ky) OR (sach y)) ((nang ho) or (nang co)) hoi. hieu va am thuc va doanh tri cua te*.