Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
vu sach » vu bach, su sach, vu khach
hieu ve » hieu van
hieu va » lieu va, hieu qua
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
y nang » ky nang, ly nang, v 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.

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach y nang x hoi. ((hieu ve) or (hieu va)) am thuc va hanh vi su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach y nang x hoi. ((hieu ve) OR (hieu va)) am thuc va hanh vi su triet.
• Adding a wildcard symbol may retrieve word variants: vu sach y nang x hoi. ((hieu ve) or (hieu va)) am thuc va hanh vi su triet*.