Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ngoc phac do snippets" » "ngoc phan do snippets", "ngoc hai do snippets", "ngoc ha do snippets", "ngoc khac do snippets", "ngoc pham do 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 phac do 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 phac do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ngoc phac do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ngoc phac do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.