Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
ly quang » le quang, vu quang
thanh vi » hanh vi, thanh va, thanh ve
thuc day » thuc dan, thuc vat
hieu ban » hieu van, dieu ban, lieu ban
thuc va » thuc vat, thuc dan
su sach » so sach, vu sach
sach ly » sach y, sach lo, sach ty
ban can » ban dan, ban hang, ban hanh
cu hoi » cua hoi, cuu hoi, co hoi
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 quang ((cu hoi) OR (cau hoi)). hieu ban can ((thuc va) or (thuc day)) thanh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ly quang ((cu hoi) OR (cau hoi)). hieu ban can ((thuc va) OR (thuc day)) thanh vi cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ly quang ((cu hoi) OR (cau hoi)). hieu ban can ((thuc va) or (thuc day)) thanh vi cua triet".
• Adding a wildcard symbol may retrieve word variants: su sach ly quang ((cu hoi) OR (cau hoi)). hieu ban can ((thuc va) or (thuc day)) thanh vi cua triet*.