Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ngoc tan so snippets" » "ngoc tuan so snippets", "ngoc toan so snippets", "ngoc lan so snippets", "ngoc tan soi snippets", "ngoc tan son snippets", "ngoc than 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: (((("ngoc tan 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: (((("ngoc tan so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ngoc tan so snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ngoc tan so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.