Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
su triet » su viet, su tien, ve triet
van hanh » van thanh, ban hanh, van anh
thu van » thuc van, thuy van, tu van
cac thu » cach thuc, cac thoi
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
ly vang » ly van, ly quang
ly hang » ly quang
ve cac » va cac, vien cac

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 hang) or (ly vang)) x ho. hieu ve cac thu van hanh vi ((cua triet) OR (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ly hang) OR (ly vang)) x ho. hieu ve cac thu van hanh vi ((cua triet) OR (su triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ly hang) or (ly vang)) x ho. hieu ve cac thu van hanh vi ((cua triet) OR (su triet))".
• Adding a wildcard symbol may retrieve word variants: su sach ((ly hang) or (ly vang)) x ho. hieu ve cac thu van hanh vi ((cua triet) OR (su triet))*.