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