Perhaps you should try some spelling variations:
thuc day » thuc dan, thuc vat
day hanh » day nhanh, day thanh, dao hanh
su triet » su viet, su tien, ve triet
hieu ve » hieu va, hieu van
bach v » bach van
v nang » va nang, vu nang, van nang
x hoi » xa hoi, o hoi, x ho
vi su » va su, ve su, ki su

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: vu bach v nang x hoi. ((hieu ve) OR (hieu qua)) am thuc day hanh vi su triet~.
• Adding a wildcard symbol may retrieve word variants: vu bach v nang x hoi. ((hieu ve) or (hieu qua)) am thuc day hanh vi su triet*.