Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khoi le cong snippets" » "hoi le cong snippets", "khoi de cong snippets", "khoi he cong snippets", "khoi len cong snippets", "khoi te cong snippets", "khoi ve 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: (((("khoi le 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: (((("khoi le cong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khoi le cong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoi le cong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.