Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khoa phan le snippets" » "hoa phan le snippets", "khoa than le snippets", "khoa phau le snippets", "khoa pham le snippets", "khoa phan mem snippets", "khoa phan lap 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: (((("khoa phan le snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khoa phan le snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khoa phan le snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoa phan le snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.