Perhaps you should try some spelling variations:
nam thuc » nam thuoc, am thuc, nam thu
sach ky » sac ky, sach ty, sach kem
hanh va » hang va, hanh vi
xa hanh » xa thanh, xa khanh, va hanh
thuc xa » thuc xay, tuc xa, thuc va
hieu va » lieu va, hieu qua
mang xa » lang xa, mang may, dang xay
va nam » van nam, ha nam, va nay
va cua » va chua, via cua, ca cua
cua te » cua tu

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

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