Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dac tan doan snippets" » "dac tran doan snippets", "dac tap doan snippets", "dac van doan snippets", "duc tan doan snippets", "dac san doan snippets", "dai tan doan 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: (((("dac tan doan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dac tan doan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dac tan doan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dac tan doan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.