Perhaps you should try some spelling variations:
nang noi » nang doc
te sach » toc sach
danh vi » hanh vi, dinh vi, danh di
thuc va » thuc dan, thuc day
qua nam » quan nam, cua nam, quang nam
sach ky » sac ky, sach y, sach ty
nang ra » nang ma, lang ra, nang ro
vi cua » vai cua, di cua
cua tu » cua tuc, cua su, cua cu

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 noi) or (nang ra)) hoi. hieu qua nam ((thuc va) or (thuc vat)) danh vi cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky ((nang noi) OR (nang ra)) hoi. hieu qua nam ((thuc va) OR (thuc vat)) danh vi cua tu.
• Adding a wildcard symbol may retrieve word variants: te sach ky ((nang noi) or (nang ra)) hoi. hieu qua nam ((thuc va) or (thuc vat)) danh vi cua tu*.