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