Perhaps you should try some spelling variations:
dang thanh » dong thanh, dang hanh, hoang thanh
thuc dang » thuoc dang, thuc dan, thuc dung
thanh vai » thanh hai, thanh van, thanh tai
nam thuc » nam thuoc, am thuc, nam thu
cua viet » hoa viet, cua vat, cua dieu
sach ky » sac ky, sach ty, sach kem
hieu ha » hieu hoa, hieu va, hieu ca
ca viet » va viet, co viet, hoa viet
x hoi » xa hoi, o hoi, x ho

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 ky) or (sach y)) nang x hoi. hieu ha nam thuc dang thanh vai ((cua viet) OR (ca viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ky) OR (sach y)) nang x hoi. hieu ha nam thuc dang thanh vai ((cua viet) OR (ca viet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ky) or (sach y)) nang x hoi. hieu ha nam thuc dang thanh vai ((cua viet) OR (ca viet))*".