Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cac don long snippets" » "cac do long snippets", "cac ion long snippets", "cac dinh long snippets", "cac dan long snippets", "cac mon long snippets", "cac doanh long 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: (((("cac don long snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cac don long snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cac don long snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cac don long snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.