Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phan che du snippets" » "han che du snippets", "phap che du snippets", "phan thi du snippets", "phan che do snippets", "phan che tu snippets", "phan che duoc 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: (((("phan che du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("phan che du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phan che du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phan che du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.