Perhaps you should try some spelling variations:
"За советскую наук" » "За советская наук" (Expand Search), "За советскии наук" (Expand Search), "За советское наук" (Expand Search)
"За советскую науки" » "За советская науки" (Expand Search), "За советскии науки" (Expand Search), "За советское науки" (Expand Search)
"За советскую наука" » "За советская наука" (Expand Search), "За советскии наука" (Expand Search), "За советское наука" (Expand Search)

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"За советскую наук\") OR (((\"За советскую науки\") OR (\"За советскую наука\"))))~".
• Removing quotes may allow a broader search: (( За советскую наук ) OR ((( За советскую науки ) OR ( За советскую наука ))))~.
• Adding a wildcard symbol may retrieve word variants: (("За советскую наук") OR ((("За советскую науки") OR ("За советскую наука"))))*.