Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thuc van » thuc vat, thuc dan, thuc va
thanh di » thanh doi, thanh de, thanh do
nam thuc » nam thuoc, am thuc, nam thu
cua tre » cuu tre, cua triet, dua tren
nang ma » tang ma, sang ma, nang cao
hieu he » hieu ve, hiem he, hieu le
he nam » ha nam, nghe nam
ma hoi » mai hoi, xa hoi, ma hoa
sac ky » cac ky, sai ky
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: su ((sach y) or (sac ky)) nang ma hoi. hieu he nam thuc van thanh di ((cua tre) OR (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach y) OR (sac ky)) nang ma hoi. hieu he nam thuc van thanh di ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach y) or (sac ky)) nang ma hoi. hieu he nam thuc van thanh di ((cua tre) OR (cua te))".
• Adding a wildcard symbol may retrieve word variants: su ((sach y) or (sac ky)) nang ma hoi. hieu he nam thuc van thanh di ((cua tre) OR (cua te))*.