Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh hoi » hanh thoi, hanh noi, hanh hoa
van hanh » van thanh, ban hanh, van anh
hieu va » lieu va, hieu qua
hoi cua » hoi chuc
duc van » duc va, duc tan, duc manh
cac duc » cac du, cao duc, cac dac
su sach » so sach, vu sach
hieu ve » hieu van
tay hoi » tay ho, tao hoi, tay thai
ky danh » ky anh
ky dang » ky nang

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 dang) or (ky danh)) tay hoi. ((hieu ve) or (hieu va)) cac duc van hanh hoi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ky dang) OR (ky danh)) tay hoi. ((hieu ve) OR (hieu va)) cac duc van hanh hoi cua triet.
• Adding a wildcard symbol may retrieve word variants: su sach ((ky dang) or (ky danh)) tay hoi. ((hieu ve) or (hieu va)) cac duc van hanh hoi cua triet*.