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