Open the PDF document that you want to edit using Adobe Acrobat Pro.
Now left-click once on the "Document" drop-down menu, once on "OCR Text Recognition" and select the "Recognize Text Using OCR" option. This will generate a pop-up window asking you to identify which pages of the document you want to complete the text recognition process for. Choose from the "Current page" or "From page" options. Click once on the "OK" button.
Left-click once on the "Tools" drop-down menu after the text recognition process has completed. Click once on "Advanced Editing" and select the "TouchUp Text Tool" option.
Highlight the word or words that you want to edit in the PDF document, using the cursor.
Type the corrected or additional text directly into the document. You can also delete the highlighted text by using the "Delete" key. As you type toward the right of the page, you might notice that any text that you add to the original document will not wrap. It will continue off the page. That noted, be aware of your space limitations.
Save any changes you make. Save the edited PDF with a new name to preserve the integrity of the original document.
If you you don't have Adobe Acrobat Profession, you may try Classic PDF Editor; Alternative to Adobe Acrobat X Pro.
Method 3: PDFdu PDF Text Replace
PDFdu PDF Text Replace is developed for replacing text of PDF.It is a very simple, lightning-quick desktop utility program that lets you batch replace, change or delete multiples text in PDF files automatically. It can replace specified text in specified positions of pages for all selected PDF files in batches. A user can replace more than one text string with more than one different text string for more than one different PDF files.