Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khu van hoat snippets" » "khu van hoa snippets", "khu van hoan snippets", "khu dan hoat snippets", "khau van hoat snippets", "khuc van hoat snippets", "chu van 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: (((("khu van 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: (((("khu van hoat snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khu van hoat snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khu van hoat snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.