Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hap mot cong snippets" » "hap moi cong snippets", "hap hoc cong snippets", "hap bo cong snippets", "han mot cong snippets", "hop mot cong snippets", "lap mot cong 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: (((("hap mot cong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hap mot cong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hap mot cong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hap mot cong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.