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