Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
toc sach » hoc sach, doc sach, thuoc sach
ve cham » va cham, ve chat, vu cham
lang xa » lang ha, dang xay, lang van
ty lang » tay lang, ty xang, ty hang
di cua » dai cua, doi cua, de cua
ve cam » ve cac, va cam, ve cai
va da » va dao, va dau, va dap
da di » pa di, da gi, ma di

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) OR (toc sach)) ty lang xa hoi. hieu ((ve cam) or (ve cham)) duc va da di cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) ty lang xa hoi. hieu ((ve cam) OR (ve cham)) duc va da di cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) OR (toc sach)) ty lang xa hoi. hieu ((ve cam) or (ve cham)) duc va da di cua triet".
• Adding a wildcard symbol may retrieve word variants: ((te sach) OR (toc sach)) ty lang xa hoi. hieu ((ve cam) or (ve cham)) duc va da di cua triet*.