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