Perhaps you should try some spelling variations:
su sach » so sach, vu sach
ky lang » ky dang, ky tang, tay lang
dai hoi » dai hoc, dai hai, dai moi
hieu ve » hieu va, hieu van
ve cam » ve cham, ve cac, va cam
xuc va » duc va, tuc va, luc va
va dao » ca dao
vi va » vai va, vu va, bi va

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

• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ky lang) OR (ky nang)) dai hoi. hieu ve cam xuc va dao ((vi va) OR (vi van)) triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ky lang) OR (ky nang)) dai hoi. hieu ve cam xuc va dao ((vi va) or (vi van)) triet~".
• Adding a wildcard symbol may retrieve word variants: su sach ((ky lang) OR (ky nang)) dai hoi. hieu ve cam xuc va dao ((vi va) or (vi van)) triet*.