Perhaps you should try some spelling variations:
khanh tai » thanh tai, hanh tai, nhanh thai
xa khanh » xa thanh, van khanh, dat khanh
dang xay » dang van, van xay
nam thuc » nam thuoc, am thuc, nam thu
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, te sach
tai cua » thai cua, tai cuc, tri cua
thuc xa » thuc xay, tuc xa, thuc va
cua tre » cua te, cuu tre, cua triet
sach ky » sac ky, sach y, sach ty
mang xa » lang xa, mang may, mang cua

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 ((((mang xa) or (dang xay))) or (nang x)) hoi. hieu van nam thuc xa khanh tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky ((((mang xa) OR (dang xay))) OR (nang x)) hoi. hieu van nam thuc xa khanh tai cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((((mang xa) or (dang xay))) or (nang x)) hoi. hieu van nam thuc xa khanh tai cua tre*.