Perhaps you should try some spelling variations:
trung van » truong van, trong van, trung va
cao trung » cao truong, tao trung, bao trung
su triet » su viet, su tien, ve triet
van hanh » van thanh, ban hanh, van anh
hieu va » lieu va, hieu qua
vu sach » vu bach, su sach, vu khach
ty nang » ky nang, ty xang, ly nang
ty hang » ly hang, ty xang, thi hang
hieu ve » hieu van
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 ((ty nang) OR (ty hang)) x hoi. ((hieu ve) or (hieu va)) cao trung van hanh vi su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ((ty nang) OR (ty hang)) x hoi. ((hieu ve) OR (hieu va)) cao trung van hanh vi su triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ((ty nang) OR (ty hang)) x hoi. ((hieu ve) or (hieu va)) cao trung van hanh vi su triet*".