Perhaps you should try some spelling variations:
"Американскии физическии союз" » "Американскии физических союз" (Expand Search), "Американскии физическая союз" (Expand Search), "Американскии физическое союз" (Expand Search), "Американскии физическии союза" (Expand Search)
"Американскии химическии союз" » "Американскии химическии союза" (Expand Search), "Американскии химические союз" (Expand Search), "Американскии химических союз" (Expand Search)

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("Американскии физическии союз") OR ("Американскии химическии союз"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"Американскии физическии союз\") OR (\"Американскии химическии союз\"))".
• Removing quotes may allow a broader search: (( Американскии физическии союз ) OR ( Американскии химическии союз )).
• Adding a wildcard symbol may retrieve word variants: (("Американскии физическии союз") OR ("Американскии химическии союз"))*.