Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
gia doanh » gia thanh, gia dinh, giai doan
tai cua » thai cua, tai cuc, tri cua
duc gia » quoc gia
tu sach » thu sach, su sach, te sach
ly hang » ly quang
ly vang » ly van, ly quang
ve cac » va cac, vien cac
ve cam » ve cham, va cam, ve cai

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ((ly vang) OR (ly hang)) xa hoi. hieu ((ve cam) or (ve cac)) duc gia doanh tai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ly vang) OR (ly hang)) xa hoi. hieu ((ve cam) OR (ve cac)) duc gia doanh tai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ly vang) OR (ly hang)) xa hoi. hieu ((ve cam) or (ve cac)) duc gia doanh tai cua triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ly vang) OR (ly hang)) xa hoi. hieu ((ve cam) or (ve cac)) duc gia doanh tai cua triet*.