Perhaps you should try some spelling variations:
sistemlerinin istatistikler » sisteminin istatistiki (Expand Search)
guvenlik sistemlerinin » guvenlik sisteminin (Expand Search), guvenlik sistemleri (Expand Search), guvenlik sisteminde (Expand Search)
nukleer santrallarin » nukleer santral (Expand Search)
nukleer sanayiler » nukleer sanayii (Expand Search), ulkeler sanayiler (Expand Search)
nukleer sanayi » nukleer sanayii (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: (( ((nukleer santraller) OR (nukleer santrallarin)) guvenlik sistemlerinin istatistikler ) OR ( ((nukleer sanayiler) OR (nukleer sanayi)) oecd ulkeleri istatistikler ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( ((nukleer santraller) OR (nukleer santrallarin)) guvenlik sistemlerinin istatistikler ) OR ( ((nukleer sanayiler) OR (nukleer sanayi)) oecd ulkeleri istatistikler ))".
• Adding a wildcard symbol may retrieve word variants: (( ((nukleer santraller) OR (nukleer santrallarin)) guvenlik sistemlerinin istatistikler ) OR ( ((nukleer sanayiler) OR (nukleer sanayi)) oecd ulkeleri istatistikler ))*.