Perhaps you should try some spelling variations:
day nhanh » day thanh, duy nhanh, dac nhan
su triet » su viet, su tien, ve triet
thuc day » thuc dan, thuc vat
cua viet » ca viet, hoa viet, cua vat
nhanh di » nhanh vi, nhanh li, nhanh dien
su sach » so sach, vu sach
hieu va » lieu va, hieu qua
hieu ve » hieu van
y nang » ky nang, ly nang, v nang
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 y nang x hoi. ((hieu ve) or (hieu va)) am thuc day nhanh di ((cua viet) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang x hoi. ((hieu ve) OR (hieu va)) am thuc day nhanh di ((cua viet) OR (su triet)).
• Adding a wildcard symbol may retrieve word variants: su sach y nang x hoi. ((hieu ve) or (hieu va)) am thuc day nhanh di ((cua viet) or (su triet))*.