Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
doanh cua » doanh luan
va doanh » van doanh, vay doanh, va danh
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
cua cua » cua chua, ca cua, qua cua
cac xuc » cam xuc, chat xuc, cac cuoc
sach ky » sac ky, sach y, sach ty
te sach » toc sach
lang xa » lang ha, dang xay, lang van
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua

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: te sach ky ((lang xa) OR (nang ma)) hoi. hieu va ((cac xuc) OR (cac nuoc)) va doanh cua cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky ((lang xa) or (nang ma)) hoi. hieu va ((cac xuc) OR (cac nuoc)) va doanh cua cua triet~".
• Adding a wildcard symbol may retrieve word variants: te sach ky ((lang xa) or (nang ma)) hoi. hieu va ((cac xuc) OR (cac nuoc)) va doanh cua cua triet*.