Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"den tac can snippets" » "den cac can snippets", "den xac can snippets", "len tac can snippets", "den tac van snippets", "den tac quan snippets", "den tac vang 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: (((("den tac 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: (((("den tac can snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( den tac can snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("den tac can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.