Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"han luoc cac snippets" » "han quoc cac snippets", "phan quoc cac snippets", "nhan cuoc cac snippets", "han duoc cac snippets", "han luoc can 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 luoc cac 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 luoc cac snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( han luoc cac snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("han luoc cac snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.