Perhaps you should try some spelling variations:
nguoi sach » nguoi san, nuoc sach
cua triet » cua viet, su triet, va triet
cac phuc » cau phuc, khac phuc, cach thuc
van hanh » van thanh, van anh, van ban
ban hanh » ban hang
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
ve cac » va cac, vien cac
di cua » dai cua, doi cua, de cua
x hoi » o hoi, x ho, 5 hoi

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: nguoi sach ky nang ((x hoi) OR (xa hoi)). hieu ve cac phuc ((van hanh) or (ban hanh)) di cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nguoi sach ky nang ((x hoi) OR (xa hoi)). hieu ve cac phuc ((van hanh) OR (ban hanh)) di cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "nguoi sach ky nang ((x hoi) OR (xa hoi)). hieu ve cac phuc ((van hanh) or (ban hanh)) di cua triet".
• Adding a wildcard symbol may retrieve word variants: nguoi sach ky nang ((x hoi) OR (xa hoi)). hieu ve cac phuc ((van hanh) or (ban hanh)) di cua triet*.