Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khoi van chi snippets" » "khoi can chi snippets", "khoi va chi snippets", "thoai van chi snippets", "khoi van chien snippets", "khoi luan chi snippets", "khoi van chat 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 van chi 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 van chi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khoi van chi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoi van chi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.