Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khoan va he snippets" » "doan va he snippets", "khoa ma he snippets", "nhan va he snippets", "khoan va che snippets", "khoan va ghe snippets", "khoan va de 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: (((("khoan va he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khoan va he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khoan va he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoan va he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.