Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu van » thien van, lieu va, hieu ve
van hanh » van thanh, ban hanh, van anh
sach ty » sach tu, sach thu, xach tay
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
xuc van » duc van, luc van, xuc ban
vi cua » vai cua, di cua

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: tu ((sach ty) OR (sach y)) nang ma hoa. ((hieu van) OR (hieu va)) cam xuc van hanh vi cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ty) or (sach y)) nang ma hoa. ((hieu van) OR (hieu va)) cam xuc van hanh vi cua triet~".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) or (sach y)) nang ma hoa. ((hieu van) OR (hieu va)) cam xuc van hanh vi cua triet*.