Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh doi » thanh doi, hanh noi, hang doi
hieu van » hieu va, thien van, lieu va
sach ly » sach y, sach lo, sach ty
nam xuc » nam xua, nam thuc, nam duoc
va hanh » van hanh, va thanh, va danh
ly hang » ly quang
doi cua » dai cua, hoi cua, dong cua
tu sach » thu sach, su sach, te sach
ca hoi » cau hoi, cua hoi, co hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ly hang ((ca hoi) or (xa hoi)). hieu van ((nam xuc) OR (cam xuc)) va hanh doi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ly hang ((ca hoi) OR (xa hoi)). hieu van ((nam xuc) OR (cam xuc)) va hanh doi cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ly hang ((ca hoi) or (xa hoi)). hieu van ((nam xuc) OR (cam xuc)) va hanh doi cua triet*".