Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
va hanh » van hanh, va thanh, va danh
sach ky » sac ky, sach y, sach ty
so sach » so sanh, bo sach, co sach
lang xa » dang xay, lang van
lang ha » long ha
ve cai » va cai, ve tai, ve cau
ve cac » va cac, vien cac
xuc va » duc va, tuc va, luc va
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: so sach ky ((lang xa) OR (lang ha)) hoi. hieu ((ve cai) or (ve cac)) xuc va hanh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky ((lang xa) OR (lang ha)) hoi. hieu ((ve cai) OR (ve cac)) xuc va hanh vi cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ky ((lang xa) OR (lang ha)) hoi. hieu ((ve cai) or (ve cac)) xuc va hanh vi cua triet".
• Adding a wildcard symbol may retrieve word variants: so sach ky ((lang xa) OR (lang ha)) hoi. hieu ((ve cai) or (ve cac)) xuc va hanh vi cua triet*.