Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van hanh » van thanh, ban hanh, van anh
sach tu » sach thu, cach tu, sach uu
lang xa » lang ha, dang xay, lang van
sach ty » sach thu, xach tay, sach hay
hieu va » lieu va, hieu qua
cam tuc » cam xuc, cam tu, nam thuc
tuc van » thuc van, truc van, tuc va
hanh de » hanh ve, hanh kem
va cam » va cham, va cac, va cao
de cua » le cua, te cua, dieu 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: te ((((sach ty) OR (sach y))) OR (sach tu)) lang xa hoi. hieu va cam tuc van hanh de cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((((sach ty) OR (sach y))) or (sach tu)) lang xa hoi. hieu va cam tuc van hanh de cua triet~".
• Adding a wildcard symbol may retrieve word variants: te ((((sach ty) OR (sach y))) or (sach tu)) lang xa hoi. hieu va cam tuc van hanh de cua triet*.