Perhaps you should try some spelling variations:
"dung phu chan snippets" » "dung phu code snippets", "dung phan chan snippets", "dung cho chan snippets", "dung he chan snippets", "dung chu chan snippets", "dung phu can snippets", "dung phu chung snippets"
"locating bug core snippets" » "locating bug code snippets"
"dung java java snippets" » "dung va java snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("dung phu chan snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung phu chan snippets") OR ("dung java java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( dung phu chan snippets ) or ( dung java java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung phu chan snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))*.