Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van hanh » van thanh, ban hanh, van anh
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
thi van » thi lan, thi hanh, thi nang
thu van » thuc van, thuy van, tu van
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky nang xa hoi. ((thien van) OR (thi van)) nam thu van hanh vi cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang xa hoi. ((thien van) OR (thi van)) nam thu van hanh vi cua triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. ((thien van) OR (thi van)) nam thu van hanh vi cua triet*.