Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh doi » thanh loi, thanh moi, thanh do
hieu van » hieu va, thien van, lieu va
nam thuc » nam thuoc, am thuc, nam thu
thuc ban » thuoc ban, thuc dan, thu ban
toc sac » toc sach, toc san, hoc sach
nang ma » tang ma, sang ma, nang cao
cua tre » cuu tre, cua triet, dua tren
sac ky » cac ky, sai ky
ma hoi » mai hoi, xa hoi, ma hoa
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: toc sac ky nang ma hoi. hieu van nam thuc ban thanh doi ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sac ky nang ma hoi. hieu van nam thuc ban thanh doi ((cua tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: toc sac ky nang ma hoi. hieu van nam thuc ban thanh doi ((cua tre) or (cua te))*.