Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
van dinh » van minh, van dich, va dinh
dinh ke » dinh ket, dinh ve, dinh le
cau luc » cau truc, cau phuc
te sach » toc sach
hieu va » lieu va, hieu qua
cu lang » cua lang, tu lang, xu lang
tu xang » ty xang, tu lang, tu quang
ke va » te 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 ((tu xang) or (cu lang)) xa hoi. hieu va ((cau luc) or (cam xuc)) van dinh ke va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((tu xang) OR (cu lang)) xa hoi. hieu va ((cau luc) OR (cam xuc)) van dinh ke va triet.
• Adding a wildcard symbol may retrieve word variants: te sach ((tu xang) or (cu lang)) xa hoi. hieu va ((cau luc) or (cam xuc)) van dinh ke va triet*.