Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khoi su hoat snippets" » "khoi su hoan snippets", "khoi su hoa snippets", "khoi vu hoat snippets", "khoa su hoat snippets", "hoi su hoat snippets", "thoi su hoat 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 su hoat 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 su hoat snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khoi su hoat snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoi su hoat snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.