Perhaps you should try some spelling variations:
cuong sau » cong san, cuong ma, cuong bai
su triet » su viet, su tien, ve triet
va hanh » van hanh, va thanh, va danh
cam luc » cam xuc, cau luc
cuu tre » cua tre, cau tren, cau treo
hieu va » lieu va, hieu qua
sau ky » sac ky, sai ky, su ky
luc va » duc va, tuc va, loc va
va cam » va cham, va cac, va cao
o hoi » co hoi, o hoc, o hai
x hoi » xa hoi, x ho, 5 hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: cuong sau ky nang ((x hoi) or (o hoi)). hieu va cam luc va hanh vi ((su triet) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: cuong sau ky nang ((x hoi) OR (o hoi)). hieu va cam luc va hanh vi ((su triet) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: cuong sau ky nang ((x hoi) or (o hoi)). hieu va cam luc va hanh vi ((su triet) or (cuu tre))*.