Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh hai » thanh hai, nhanh hai, hang hai
van hanh » van thanh, ban hanh, van anh
hai cua » thai cua, dai cua, hoi cua
hieu va » lieu va, hieu qua
sach ky » sac ky, sach y, sach ty
su sach » so sach, vu sach
hieu ve » hieu van
ky danh » ky anh, ky dang
cac tu » cac thu, cach tu, cac du
tu van » tu va
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: su sach ky danh ((ca hoi) or (xa hoi)). ((hieu ve) OR (hieu va)) cac tu van hanh hai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky danh ((ca hoi) OR (xa hoi)). ((hieu ve) OR (hieu va)) cac tu van hanh hai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky danh ((ca hoi) or (xa hoi)). ((hieu ve) OR (hieu va)) cac tu van hanh hai cua triet".
• Adding a wildcard symbol may retrieve word variants: su sach ky danh ((ca hoi) or (xa hoi)). ((hieu ve) OR (hieu va)) cac tu van hanh hai cua triet*.