Perhaps you should try some spelling variations:
van quang » tran quang, van tuan, ban quan
ve triet » va trien, su triet
van quan » van ban
van hanh » van thanh, ban hanh, van anh
chat xuc » chat huu, cam xuc, chao xu
hanh va » hang va, hanh vi
su bach » vu bach, su sach, huu bach
hieu ve » hieu va, hieu van
cac xuc » cam xuc, cac nuoc, cac cuoc
va ve » va de, va le, va vi

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

• Performing a fuzzy search may retrieve terms with similar spellings: su bach ((van quang) or (van quan)) xa hoi. hieu ve ((cac xuc) OR (chat xuc)) van hanh va ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su bach ((van quang) OR (van quan)) xa hoi. hieu ve ((cac xuc) OR (chat xuc)) van hanh va ve triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su bach ((van quang) or (van quan)) xa hoi. hieu ve ((cac xuc) OR (chat xuc)) van hanh va ve triet".
• Adding a wildcard symbol may retrieve word variants: su bach ((van quang) or (van quan)) xa hoi. hieu ve ((cac xuc) OR (chat xuc)) van hanh va ve triet*.