Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
ban hanh » ban hang
van hanh » van thanh, van anh, van ban
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
cac luc » cau luc, coc luc, cac nuoc
va hanh » va thanh, va danh, dao hanh
ve cac » va cac, vien cac
ca cua » co cua

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