Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh dai » hanh tai, hanh dao, vanh dai
te sach » toc sach
lang xa » lang ha, dang xay, lang van
hieu va » hieu qua
cau loc » hau loc, cau hoc, cau luc
va hanh » van hanh, va thanh, va danh
loc va » hoc va, luc va

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 _ lang xa hoi. ((hieu va) or (lieu va)) cau loc va hanh dai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach _ lang xa hoi. ((hieu va) OR (lieu va)) cau loc va hanh dai cua triet.
• Adding a wildcard symbol may retrieve word variants: te sach _ lang xa hoi. ((hieu va) or (lieu va)) cau loc va hanh dai cua triet*.