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