Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hat phan co snippets" » "hat nhan co snippets", "sat phan co snippets", "vat phan co snippets", "hat phan bo snippets", "hat phan cong snippets", "hat phan cac 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: (((("hat phan co snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hat phan co snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hat phan co snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hat phan co snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.