Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
van quang » tran quang, van tuan, ban quan
van quan » van ban
van hanh » ban hanh, van anh, van ban
su bach » vu bach, su sach, huu bach
hieu ve » hieu va, hieu van
su viet » so viet
ve cam » ve cham, ve cac, va cam

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