Perhaps you should try some spelling variations:
chat xuc » chat huu, cam xuc, chat cua
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
cao hoi » cau hoi, cao hoc, tao hoi
hieu ve » hieu va, hieu van
va hanh » van hanh, va thanh, va danh
co hoi » co hoc, co loi
vi cua » vai cua, di cua
cua te » cua tu

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 ty xang ((cao hoi) OR (co hoi)). hieu ve ((chat xuc) OR (chao xu)) va hanh vi cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty xang ((cao hoi) or (co hoi)). hieu ve ((chat xuc) OR (chao xu)) va hanh vi cua te~".
• Adding a wildcard symbol may retrieve word variants: su sach ty xang ((cao hoi) or (co hoi)). hieu ve ((chat xuc) OR (chao xu)) va hanh vi cua te*.