Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van hanh » van thanh, ban hanh, van anh
vien cac » vien bach, vien dai, vien da
thu van » thuc van, thuy van, tu van
sach ky » sac ky, sach y, sach ty
tu sach » thu sach, su sach, te sach
canh xa » canh va, canh tac, canh tay
danh xa » danh ca, dinh xa, dan xa
vi cua » vai cua, di cua
ve cac » va cac

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