Perhaps you should try some spelling variations:
et conferences » a conference (Expand Search)
conference sur » conference _ (Expand Search), conference where (Expand Search)
xviiie siecle » xvie siecle (Expand Search)
xvie siecles » xvie siecle (Expand Search), xxe siecle (Expand Search)
sur le » sur la (Expand Search)
colloques, » colloque, (Expand Search)
congres » congress (Expand Search), kongress (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: (( colloques, congres et conferences sur le xvie siecles ) or ((( colloques, congres _ conference sur le xvie siecles ) or ((( colloques, congres _ conference sur le xviiie siecle ) OR ( colloques, congres _ conference sur au xviiie siecle ))))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( colloques, congres et conferences sur le xvie siecles ) OR ((( colloques, congres _ conference sur le xvie siecles ) OR ((( colloques, congres _ conference sur le xviiie siecle ) OR ( colloques, congres _ conference sur au xviiie siecle )))))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( colloques, congres et conferences sur le xvie siecles ) or ((( colloques, congres _ conference sur le xvie siecles ) or ((( colloques, congres _ conference sur le xviiie siecle ) OR ( colloques, congres _ conference sur au xviiie siecle ))))))".
• Adding a wildcard symbol may retrieve word variants: (( colloques, congres et conferences sur le xvie siecles ) or ((( colloques, congres _ conference sur le xvie siecles ) or ((( colloques, congres _ conference sur le xviiie siecle ) OR ( colloques, congres _ conference sur au xviiie siecle ))))))*.