Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"doan nam he snippets" » "dan nam he snippets", "hoang nam he snippets", "doan va he snippets", "doan nam ha snippets", "doan nam hien snippets", "doan nam nghe 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: (((("doan nam 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: (((("doan nam he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doan nam he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doan nam he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.