Perhaps you should try some spelling variations:
pham chuc » pham duc, pham huu, kham chua
danh dai » danh dau, danh sai, vanh dai
hieu van » hieu va, thien van, lieu va
van pham » san pham, van phan, van phat
nang ma » tang ma, sang ma, nang cao
sach ky » sac ky, sach ty, sach kem
chuc va » thuc va, thuc vat
danh di » danh du, xanh di, danh dien
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa

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: toc ((sach ky) OR (sach y)) nang ma hoi. hieu van pham chuc va ((danh dai) OR (danh di)) cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc ((sach ky) or (sach y)) nang ma hoi. hieu van pham chuc va ((danh dai) OR (danh di)) cua tre~".
• Adding a wildcard symbol may retrieve word variants: toc ((sach ky) or (sach y)) nang ma hoi. hieu van pham chuc va ((danh dai) OR (danh di)) cua tre*.