Perhaps you should try some spelling variations:
dang xay » dang van, van xay
nam thuc » nam thuoc, am thuc, nam thu
hanh tai » thanh tai, hang tai, han tai
nang ma » tang ma, sang ma, nang cao
hieu le » hieu ve, hieu he, hieu ly
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
tai cua » thai cua, tai cuc, tri cua
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
le nam » ly nam, he nam, le na
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 sac ky ((nang ma) or (dang xay)) hoi. hieu le nam thuc va hanh tai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky ((nang ma) OR (dang xay)) hoi. hieu le nam thuc va hanh tai cua te.
• Adding a wildcard symbol may retrieve word variants: tu sac ky ((nang ma) or (dang xay)) hoi. hieu le nam thuc va hanh tai cua te*.