Perhaps you should try some spelling variations:
"soviet period relation humain eiu." » "soviet period section humain eiu.", "soviet period population humain eiu.", "soviet period migration humain eiu.", "soviet period relations humaines eiu.", "soviet period relation humain du.", "soviet period relation humain et."
"soviet v relationen eine kyiv." » "soviet v relations eine kyiv.", "soviet v reflexionen eine kyiv.", "soviet v relationens inre kyiv.", "soviet iv relationen eine kyiv.", "soviet 2 relationen eine kyiv.", "soviet 8 relationen eine kyiv.", "soviet _ relationen eine kyiv.", "soviet he relationen eine kyiv.", "soviets _ relationen eine kyiv."

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("soviet period relation humain eiu.") or ("soviet v relationen eine kyiv."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("soviet period relation humain eiu.") OR ("soviet v relationen eine kyiv.")).
• Removing quotes may allow a broader search: (( soviet period relation humain eiu. ) or ( soviet v relationen eine kyiv. )).
• Adding a wildcard symbol may retrieve word variants: (("soviet period relation humain eiu.") or ("soviet v relationen eine kyiv."))*.