Perhaps you should try some spelling variations:
hien daii » vien dai, nhien dai, bien dai
thuc day » thuc dan, thuc vat
day hanh » day nhanh, day thanh, dao hanh
va triet » va thiet, va trien, ve triet
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
hanh de » hanh ve, hanh kem
va cam » va cham, va cac, va cao
x hoi » xa hoi, o hoi, x ho
de va » de van, te va, ke va

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 nang x hoi. hieu ((va cam) or (((hien dai) or (hien daii)))) thuc day hanh de va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang x hoi. hieu ((va cam) OR (((hien dai) OR (hien daii)))) thuc day hanh de va triet.
• Adding a wildcard symbol may retrieve word variants: su sach ky nang x hoi. hieu ((va cam) or (((hien dai) or (hien daii)))) thuc day hanh de va triet*.