Perhaps you should try some spelling variations:
nam thuc » nam thuoc, am thuc, nam thu
hang tai » hang va, dung tai
hanh tai » thanh tai, han tai, hinh tai
sach ky » sac ky, sach y, sach ty
thuc xa » thuc xay, tuc xa, thuc va
te sach » toc sach
qua nam » quan nam, cua nam, quang nam
mai hoi » mai khoi, dai hoi, lai hoi
cuu tre » cua tre, cau tren, cau treo
ma hoi » xa hoi, ma hoa, me hoi

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: te sach ky nang ((ma hoi) OR (mai hoi)). hieu qua nam thuc xa ((hanh tai) OR (hang tai)) cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang ((ma hoi) or (mai hoi)). hieu qua nam thuc xa ((hanh tai) OR (hang tai)) cuu tre~".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ((ma hoi) or (mai hoi)). hieu qua nam thuc xa ((hanh tai) OR (hang tai)) cuu tre*.