Perhaps you should try some spelling variations:
cua triet » su triet, va triet
danh dai » danh dau, danh di, danh sai
cua viet » ca viet, hoa viet, cua vat
sach ky » sach y, sach ty, sach kem
hieu va » lieu va, hieu qua
thuc va » thuc vat, thuc dan, thuc day
va danh » va dinh, va dan, va hanh
sac ky » cac ky, sai ky
x hoi » xa hoi, o hoi, x ho
va am » va lam, va cam

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 va am thuc va danh dai ((cua 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 va am thuc va danh dai ((cua triet) or (cua viet))~".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) OR (sac ky)) nang x hoi. hieu va am thuc va danh dai ((cua triet) or (cua viet))*.