Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh de » hanh ve, hanh kem
hanh le » thanh le, hanh ve, manh le
sach ky » sac ky, sach y, sach ty
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, mang xa
nang ma » tang ma, sang ma, nang cao
cau tuc » cau truc, cau tu, cau luc
va cau » van cau, va cac, va dau
tuc va » thuc va, truc va, tuc xa

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 ky ((nang xa) OR (nang ma)) hoi. lieu va cau tuc va ((hanh le) OR (hanh de)) cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky ((nang xa) or (nang ma)) hoi. lieu va cau tuc va ((hanh le) OR (hanh de)) cua triet~".
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((nang xa) or (nang ma)) hoi. lieu va cau tuc va ((hanh le) OR (hanh de)) cua triet*.