Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc nghe do snippets" » "duc nghia do snippets", "duc ngoc do snippets", "day nghe do snippets", "duc nghe co snippets", "duc nghe so snippets", "duc nghe di 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: (((("duc nghe 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: (((("duc nghe do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc nghe do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc nghe do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.