Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"kieu dan den snippets" » "kieu doan den snippets", "kieu van den snippets", "sieu dan den snippets", "kieu ban den snippets", "kieu dan dung 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: (((("kieu dan den snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("kieu dan den snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( kieu dan den snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("kieu dan den snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.