Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khac son cap snippets" » "khach san cap snippets", "khanh son cap snippets", "thai son cap snippets", "khac so cap snippets", "khac doan cap snippets", "khac dong cap 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: (((("khac son cap snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khac son cap snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khac son cap snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khac son cap snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.