Perhaps you should try some spelling variations:
integration theories » integration theorems, integrationstheorie 2, integration theory
care conservation » charge conservation, scale conservation, area conservation
price integration » service integration, trade integration, price indexation
support care » support can, support come, supportive care
export price » export prices, import prices

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( support care conservation efforts. ) or ( export price integration theories. ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( support care conservation efforts. ) OR ( export price integration theories. )).
• Adding a wildcard symbol may retrieve word variants: (( support care conservation efforts. ) or ( export price integration theories. ))*.