Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"han van chi snippets" » "phan van chi snippets", "nhan van chi snippets", "hanh van chi snippets", "han van chien snippets", "han luan chi snippets", "han van chat 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: (((("han van chi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("han van chi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( han van chi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("han van chi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.