I have created VF page that get data from report and bind in VF page.
There is also filter functionality implemented for this custom reoport.

Now I have requirement to add Report Filter Logic like we use in standard report filter i.e. (1 AND 2 AND (3 OR 4)).
But, I am not able to add it in Apex Class.

Reports.ReportDescribeResult describe = Reports.ReportManager.describeReport(REPORT_ID);
Reports.ReportMetadata reportMetadata = describe.getReportMetadata();
List<Reports.ReportFilter> lstFilters = new List<Reports.ReportFilter>();

if(String.isNotBlank(strSpread)) {
	String[] spaceSize = strSpread.split(' ');
	if(spaceSize[0].contains('-')) {
		lstFilters.addAll(addRangeFilter('Deal_Quotes__c.Spread__c',spaceSize[0].split('-')[0].trim(), spaceSize[0].split('-')[1].trim()));
	} else if(getEndRangeString(spaceSize[spaceSize.size()-1]) != '') {
		String strrange = getEndRangeString(spaceSize[spaceSize.size()-1]);
		lstFilters.addAll(addRangeFilter('Deal_Quotes__c.Spread__c',
										strrange == 'above' ? spaceSize[0].trim() : null,
										strrange == 'above' ? null : spaceSize[0].trim()));
	}
}
if(String.isNotBlank(dateRangeFrom)) {
	lstFilters.add(new Reports.ReportFilter('Deal_Quotes__c.Quote_Date__c', 'greaterOrEqual', dateRangeFrom));
}
if(String.isNotBlank(dateRangeTo)) {
	lstFilters.add(new Reports.ReportFilter('Deal_Quotes__c.Quote_Date__c', 'lessOrEqual', dateRangeTo));
}

if(lstFilters.size() > 0) {
	reportMetadata.setReportFilters(lstFilters);
}
return Reports.ReportManager.runReport(REPORT_ID, reportMetadata, true);

Above is my code. Please give me suggestion, where should I add the filter logic?