Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"lap ket doan snippets" » "lap ket hoa snippets", "lap le doan snippets", "lap ket van snippets", "lap ke doan snippets", "lam ket doan snippets", "luan ket doan 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: (((("lap ket doan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("lap ket doan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( lap ket doan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("lap ket doan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.