Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dua moi can snippets" » "cua moi can snippets", "dua voi can snippets", "vua moi can snippets", "dua loi can snippets", "dua moi ban 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 can 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 can snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dua moi can snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dua moi can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.