Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
thanh vi » hanh vi, thanh va, thanh ve
tuc gia » tac gia, duc gia, toc gia
cam tuc » cam xuc, cam tu, nam thuc
so sach » so sanh, bo sach, co sach
nang xa » lang xa, nang ma, mang xa
hieu ve » hieu va
vi cua » vai cua, di cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: so sach y ((nang xa) or (nang x)) hoi. ((hieu ve) OR (hieu van)) cam tuc gia thanh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach y ((nang xa) OR (nang x)) hoi. ((hieu ve) OR (hieu van)) cam tuc gia thanh vi cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach y ((nang xa) or (nang x)) hoi. ((hieu ve) OR (hieu van)) cam tuc gia thanh vi cua triet".
• Adding a wildcard symbol may retrieve word variants: so sach y ((nang xa) or (nang x)) hoi. ((hieu ve) OR (hieu van)) cam tuc gia thanh vi cua triet*.