Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thong thu so snippets" » "thong thuy so snippets", "thong tu so snippets", "trong thu so snippets", "thong thuc so snippets", "thong tru so 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: (((("thong thu so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("thong thu so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thong thu so snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thong thu so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.