Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dac phan le snippets" » "dam phan le snippets", "duc phan le snippets", "dac nhan le snippets", "dac pham le snippets", "dac phan mem snippets", "dac phan lap 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 phan le 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 phan le snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dac phan le snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dac phan le snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.