Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
van thanh » ban thanh, van tuan
thuc van » thuc vat, thuc dan, thuc va
nam thuc » nam thuoc, am thuc, nam thu
hieu ve » hieu va, hieu van
nang ma » tang ma, sang ma, nang cao
hieu he » hiem he, hieu le, hieu hien
cua te » cua tu
ma hoi » mai hoi, xa hoi, ma hoa
sac ky » cac ky, sai ky

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: su ((sach y) OR (sac ky)) nang ma hoi. ((hieu he) OR (hieu ve)) nam thuc van thanh dai 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) OR (hieu ve)) nam thuc van thanh dai cua te~".
• Adding a wildcard symbol may retrieve word variants: su ((sach y) or (sac ky)) nang ma hoi. ((hieu he) OR (hieu ve)) nam thuc van thanh dai cua te*.