Perhaps you should try some spelling variations:
hanh dai » hanh tai, hanh dao, vanh dai
va triet » va thiet, va trien, ve triet
cua viet » ca viet, hoa viet, cua vat
sach ky » sach y, sach ty, sach kem
hieu ve » hieu va, hieu van
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
sac ky » cac ky, sai ky
x hoi » xa hoi, o hoi, x ho
ve am » va am

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: tu ((sach ky) OR (sac ky)) nang x hoi. hieu ve am thuc va hanh dai ((va triet) OR (cua viet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) OR (sac ky)) nang x hoi. hieu ve am thuc va hanh dai ((va triet) or (cua viet))~".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) OR (sac ky)) nang x hoi. hieu ve am thuc va hanh dai ((va triet) or (cua viet))*.