Multiple Sql Statement Not Returning A Datatable

Question

Dear Code Masters,

   I believe all of you are doing fine, i have a SQL challenge kindly view the image below 

 

what i want to achieve is the SQL statement that will  use "Select " Statement to read the table for State, LGA, Facility Name, Month1, Month2, Year Range Year1 to Year2 and Thematic Area.

 i have tried the following statement "Select * from VW_ART WHERE states='Enugu' and lga ='Udi' and Facname ='Udi Districts Hospital' AND years = '2015' OR (years= '2016' and months IN ('January' , 'December')) "

Which is not returning any records and the records are present but when i make the Year 2016 both it work

 Then if i state Months say from April to May 2016 for both, i expect two months it will display all the records in the data base.

Kindly assist me with thanks