To let your created flipbook be searchable, you may use Boxoft PDF to Flipbook.
Steps for enable search in your flipbook:
Step1: Run Boxoft PDF to Flipbook, start a new flipbook project;
Step2: Choose template from template list for your flipbook;
Step3: Import PDF for conversion, and select “Enable Search” option;
Step4: Find out Search bar under Design Setting panel (Design Setting -> Tool Bar Settings ->Search), and then set search setting (Search Button -> Show, Choice color for Search Highlight Color, etc);
Step5: Click “Apply Change” button to refresh your flipbook.