Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
xa trong » xa truong, ca trong, va trong
nam thuc » nam thuoc, am thuc, nam thu
cam tuc » cam xuc, cam tu, dam thuc
doi cua » dai cua, hoi cua
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
nang xa » lang xa, nang ma, mang 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: so sach ky ((nang xa) OR (nang x)) hoi. hieu va ((cam tuc) OR (nam thuc)) xa trong doi cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ky ((nang xa) or (nang x)) hoi. hieu va ((cam tuc) OR (nam thuc)) xa trong doi cua triet~".
• Adding a wildcard symbol may retrieve word variants: so sach ky ((nang xa) or (nang x)) hoi. hieu va ((cam tuc) OR (nam thuc)) xa trong doi cua triet*.