Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
cau duc » cau luc, chu duc, cau truc
cao duc » dao duc, cao suc, giao duc
va hanh » van hanh, va thanh, va danh
vai va » mai va, dai va, hai va
x hoi » xa hoi, o hoi, 5 hoi
thiet » thieu

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