Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dang duc le snippets" » "dang quoc le snippets", "dao duc le snippets", "dang su le snippets", "dang tuc le snippets", "dang luc le snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core 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: (((("dang duc le snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dang duc le snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dang duc le snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dang duc le snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.