Please check this filterFunction & let me know how can i improve it. These filter are working individually but not together

const filterFunction = (a) => {
  if (!includeKeyword && !searchVolume && !excludeKeyword && !longtailKeyword){
     return true
  } else if (includeKeyword && !searchVolume){
     return a.text.toLowerCase().includes(includeKeyword.toLocaleLowerCase())
  } else if (!includeKeyword && searchVolume){
     return  a.keyword_idea_metrics.avg_monthly_searches > parseInt(searchVolume)
  } else if (!searchVolume && excludeKeyword){
    return  !a.text.includes(excludeKeyword)
  } else if (!excludeKeyword && longtailKeyword){
    return  a.text.split(" ").length == longtailKeyword
  }  else {
    return  a.text.toLowerCase().includes(includeKeyword.toLocaleLowerCase()) && a.keyword_idea_metrics.avg_monthly_searches > parseInt(searchVolume)  && !a.text.includes(excludeKeyword) && a.text.split(" ").length <= longtailKeyword
  }
}

Render Function

postRes.filter(filterFunction).map((data, index) => (

i really appreciate your help in advance