Documents doesn't open up in sharepoint after performing search

I have WSS 3.0 sharepoint on-premise and it uses Windows internal database no sql.
I have created few team sites and document libraries over here.
The issue i am facing is while performing search for a particular document using keyword say "Apple" is the keyword i used in my search, all the documents having word apple gets displayed, but when i try to open that particular word document, or pdf from  the seacrh results, the file doesn't opens up.
Please tell me what might be the issue as its sounds strange for me , documents are getting displayed as a link in search result but unable to open.

Please guide me on this.
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Jamie McAllister MVPSharePoint ConsultantCommented:
It sounds like some of the results being returned should have been security trimmed as you dont have permissions, but aren't being. See this thread;

Another possibility is that the search crawler hasn't run for some time and the items that have been indexed have changed. Is there any issue with your search crawl? Is it running OK?

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techgyanAuthor Commented:
Also, one more thing i forgot to mention in my query is clicking on search result link takes me to the property of document instead of opening up the document.And i have observed that this happens only while performing search on PDF document and image file and not with excel file.What could be the reason?
Jamie McAllister MVPSharePoint ConsultantCommented:
No program associated with the file type?

No iFilter installed for the PDF files?
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techgyanAuthor Commented:
Does it really means that for pdf files to be opened up directly without redirecting it to the document property page ,we need to configure PDF ifilters in wss 3.0?
If it is so then how does pdf files got appeared in my search result , if no pdf ifilter is configured.
Again , i am not saying that pdf files are not opening up. They are opening up from search results but first the link is getting redirected to its property page.And from property page i could open that pdf file.

Also, i didn't got your query on " No program associated with the file type?

Please guide me on this as i have to solve this issue on urgent basis.
Jamie McAllister MVPSharePoint ConsultantCommented:
techgyanAuthor Commented:
I have tried to follow the steps mentioned in the link given below to configure pdf ifilter in wss 3.0 as it was not there earlier.

But still it couldn't helped me.
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