Perhaps you should try some spelling variations:
"За советскую наук" » "За советская наук" (Expand Search), "За советское наук" (Expand Search), "За советские наук" (Expand Search)
"За советскую наука" » "За советская наука" (Expand Search), "За советское наука" (Expand Search), "За советские наука" (Expand Search)
"За советскии наука" » "За советская 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 наука\") OR (\"За советскии наука\"))))~".
• Removing quotes may allow a broader search: (( За советскую наук ) OR ((( За советскую наука ) OR ( За советскии наука ))))~.
• Adding a wildcard symbol may retrieve word variants: (("За советскую наук") OR ((("За советскую наука") OR ("За советскии наука"))))*.