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
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
hieu va » lieu va, hieu qua
nang xa » lang xa, nang ma, mang xa
va nam » van nam, ha nam, va nay
cua tu » cua tuc, cua su, cua cu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty ((nang xa) OR (nang x)) hoi. hieu va nam thuc day hanh kem ((cua te) OR (cua tu))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty ((nang xa) OR (nang x)) hoi. hieu va nam thuc day hanh kem ((cua te) or (cua tu))~".
• Adding a wildcard symbol may retrieve word variants: tu sach ty ((nang xa) OR (nang x)) hoi. hieu va nam thuc day hanh kem ((cua te) or (cua tu))*.