Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dem thi cong snippets" » "dem tai cong snippets", "dem thien cong snippets", "de thi cong snippets", "dam thi cong snippets", "dem toi 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: (((("dem thi 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: (((("dem thi cong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dem thi cong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dem thi cong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.