Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"han van quan snippets" » "han van ban snippets", "phan van quan snippets", "nhan van quan snippets", "hanh van quan snippets", "han van quan slippers"
"locating bug code snippets" » "locating bug code slippers", "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 quan 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 quan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( han van quan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("han van quan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.