Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
lam duoc » nam duoc, luat duoc, lam thuoc
toc sach » doc sach, thuoc sach, nuoc sach
hieu van » thien van, lieu va, hieu ve
hoc sach » hoc sinh, hoc cac, hoc anh
xu lang » cu lang, tu lang, xu dang
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
duoc ma » duoc lam
ma hanh » va hanh, da hanh, na hanh
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: ((toc sach) OR (hoc sach)) xu lang xa hoi. ((hieu van) OR (hieu va)) lam duoc ma hanh vi cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) or (hoc sach)) xu lang xa hoi. ((hieu van) OR (hieu va)) lam duoc ma hanh vi cua triet~".
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (hoc sach)) xu lang xa hoi. ((hieu van) OR (hieu va)) lam duoc ma hanh vi cua triet*.