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