Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khoa ca ong snippets" » "khoa cam ong snippets", "khoa can ong snippets", "khoa cap ong snippets", "khoa ca muong snippets", "khoa ca trong 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: (((("khoa ca ong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khoa ca ong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khoa ca ong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoa ca ong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.