Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
ly quang » le quang, vu quang
va hanh » van hanh, va thanh, va danh
ve cham » va cham, ve chat, vu cham
so sach » so sanh, bo sach, co sach
cao hoi » cau hoi, co hoi, cao hoc
ve cac » va cac, vien cac
tuc va » thuc va, truc va, tuc xa
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ((ly quang) or (ly hang)) cao hoi. hieu ((ve cac) or (ve cham)) tuc va hanh vi cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ((ly quang) OR (ly hang)) cao hoi. hieu ((ve cac) OR (ve cham)) tuc va hanh vi cua viet.
• Adding a wildcard symbol may retrieve word variants: so sach ((ly quang) or (ly hang)) cao hoi. hieu ((ve cac) or (ve cham)) tuc va hanh vi cua viet*.