Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hang cau » hang dau, hang ca, nhung cau
toc sach » doc sach, thuoc sach, nuoc sach
doi hang » doi khang, voi hang, doi hanh
hoc sach » hoc sinh, hoc cac, hoc anh
hieu va » lieu va, hieu qua
va hanh » van hanh, va thanh, va danh
vai cua » dai cua, hai cua, lai cua
va dao » ca dao
va cam » va cham, va cac, va cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((toc sach) OR (hoc sach)) doi hang cau hoi. hieu va cam xuc ((va dao) or (va hanh)) vai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (hoc sach)) doi hang cau hoi. hieu va cam xuc ((va dao) OR (va hanh)) vai cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) OR (hoc sach)) doi hang cau hoi. hieu va cam xuc ((va dao) or (va hanh)) vai cua triet*".