Perhaps you should try some spelling variations:
nam thuc » nam thuoc, nam thu, nam tu
dan anh » dan canh, dan hanh, van anh
sach ky » sac ky, sach y, sach kem
hieu ve » hieu va, hieu van
sach ty » sach y, sach tu, sach thu
ca viet » va viet, co viet, hoa viet
anh va » hanh va
x hoi » xa hoi, o hoi, x ho
va ca » va cac, va cao, va cai

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