Perhaps you should try some spelling variations:
cau theo » cau tao
van duc » van duy, van du, tran duc
va hanh » van hanh, va thanh, va danh
hanh va » hang va, hanh vi
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky
van tu » van thu, van du, ban tu
x hoi » xa hoi, o hoi, x ho

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 sac ky nang x hoi. hieu qua ((van duc) OR (van tu)) va hanh va ((cau theo) OR (cau thi))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ky nang x hoi. hieu qua ((van duc) or (van tu)) va hanh va ((cau theo) OR (cau thi))~".
• Adding a wildcard symbol may retrieve word variants: su sac ky nang x hoi. hieu qua ((van duc) or (van tu)) va hanh va ((cau theo) OR (cau thi))*.