Perhaps you should try some spelling variations:
nhung cau » chung cu, nhung bai, nhu cau
cua triet » cua viet, su triet, va triet
ly nhung » ly khung, ky nhung, la nhung
hieu van » thien van, lieu va, hieu ve
su sach » so sach, vu sach
sach ly » sach y, sach lo, sach ty
hieu va » lieu va, hieu qua
nam xuc » cam xuc, nam xua, nam thuc
va hanh » van hanh, va thanh, va danh
xuc va » duc va, tuc va, luc 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: su sach ly nhung cau hoi. ((hieu van) or (hieu va)) nam xuc va hanh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ly nhung cau hoi. ((hieu van) OR (hieu va)) nam xuc va hanh vi cua triet.
• Adding a wildcard symbol may retrieve word variants: su sach ly nhung cau hoi. ((hieu van) or (hieu va)) nam xuc va hanh vi cua triet*.