Perhaps you should try some spelling variations:
ranh mach » trinh mach, tinh mach, ban mach
cua triet » cua viet, su triet, va triet
dang xay » dang van, van xay
dac ranh » dac manh, dau tranh, dac tinh
mach hai » manh hai, mach phan, mach vi
so sach » so sanh, bo sach, hoc sach
co sach » bo sach, cuon sach, hoc sach
ky dang » ky nang, ky danh
xay hoi » xa hoi, tay hoi, cay phoi
hieu ve » hieu va, hieu van
cac dac » cac dan, cac dai, cac bac
hai cua » thai cua, dai cua, hoi cua
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: ((so sach) OR (co sach)) ky dang xay hoi. hieu ve cac dac ranh mach hai cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) OR (co sach)) ky dang xay hoi. hieu ve cac dac ranh mach hai cua triet".
• Adding a wildcard symbol may retrieve word variants: ((so sach) OR (co sach)) ky dang xay hoi. hieu ve cac dac ranh mach hai cua triet*.