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