Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
mach phan » cach pha, dich phan, sach phat
hanh mach » ranh mach, hanh sach, tinh mach
phan cua » nhan cua, than cua, phat cua
van hanh » van thanh, ban hanh, van anh
hieu va » lieu va, hieu qua
cac van » cac dan
su sach » so sach
hieu ve » hieu van
danh xa » danh ca, dinh xa, canh xa
ky danh » ky anh, ky dang
vu sach » vu bach, vu khach

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) or (vu sach)) ky danh xa hoi. ((hieu ve) OR (hieu va)) cac van hanh mach phan cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) ky danh xa hoi. ((hieu ve) OR (hieu va)) cac van hanh mach phan cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (vu sach)) ky danh xa hoi. ((hieu ve) OR (hieu va)) cac van hanh mach phan cua triet*".