Perhaps you should try some spelling variations:
thuc day » thuc dan, thuc vat
nam thuc » nam thuoc, am thuc, nam thu
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
thi van » thi lan, thi hanh, thi nang
danh vi » hanh vi, danh di, danh va
dinh vi » dinh ve, dinh viet, dinh tri
cuu tre » cua tre, cau tren, cau treo

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky nang x ho. ((hieu ve) or (thi van)) nam thuc day ((danh vi) OR (dinh vi)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang x ho. ((hieu ve) OR (thi van)) nam thuc day ((danh vi) OR (dinh vi)) cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang x ho. ((hieu ve) or (thi van)) nam thuc day ((danh vi) OR (dinh vi)) cuu tre".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang x ho. ((hieu ve) or (thi van)) nam thuc day ((danh vi) OR (dinh vi)) cuu tre*.