Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
ly quang » le quang, vu quang
truc van » truc va, thuc van, truc ban
van hanh » van thanh, ban hanh, van anh
so sach » so sanh, bo sach, co sach
dau han » dai han, dau ha, mau han
hieu ve » hieu va, hieu van
hanh di » hanh vi, hanh de, hang di
ve cau » ke cau, va cau, ve cac
di cua » dai cua, doi cua, de 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 ((ly hang) or (ly quang)) dau han. hieu ve cau truc van hanh di cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ((ly hang) OR (ly quang)) dau han. hieu ve cau truc van hanh di cua triet.
• Adding a wildcard symbol may retrieve word variants: so sach ((ly hang) or (ly quang)) dau han. hieu ve cau truc van hanh di cua triet*.