Perhaps you should try some spelling variations:
nuoc sach » nguoi sach, hoc sach, cuoc cach
thu sach » tu sach, thuat sach, thuoc sach
dang may » mang may, dang xay, dung may
thuc day » thuc dan, thuc vat
dinh vi » dinh ve, dinh viet, dinh tri
danh vi » hanh vi, danh di, danh va
hieu va » lieu va, hieu qua
may hoi » may thoi, tay hoi, mai hoi
ky dang » ky nang, ky danh
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: ((thu sach) or (nuoc sach)) ky dang may hoi. hieu va am thuc day ((danh vi) OR (dinh vi)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (nuoc sach)) ky dang may hoi. hieu va am thuc day ((danh vi) OR (dinh vi)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) or (nuoc sach)) ky dang may hoi. hieu va am thuc day ((danh vi) OR (dinh vi)) cua te".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (nuoc sach)) ky dang may hoi. hieu va am thuc day ((danh vi) OR (dinh vi)) cua te*.