Perhaps you should try some spelling variations:
day hanh » day nhanh, day thanh, dao hanh
thuc day » thuc dan, thuc vat
nam thuc » nam thuoc, am thuc, nam thu
te sach » toc sach
hanh di » hanh vi, hanh de, hang di
cuu tre » cua tre, cau tren, cau treo
sach ky » sac ky, sach y, sach ty
hieu va » lieu va
me hoi » le hoi
di cuu » di cau, di cua, dinh cuu

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 ((me hoi) or (xa hoi)). ((hieu va) or (hieu qua)) nam thuc day hanh di cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang ((me hoi) OR (xa hoi)). ((hieu va) OR (hieu qua)) nam thuc day hanh di cuu tre.
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ((me hoi) or (xa hoi)). ((hieu va) or (hieu qua)) nam thuc day hanh di cuu tre*.