Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dua moi con snippets" » "cua moi con snippets", "dua voi con snippets", "vua moi con snippets", "dua moi cong snippets", "dua moi co snippets", "dua mot con 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: (((("dua moi con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dua moi con snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dua moi con snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dua moi con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.