Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"kho cua he snippets" » "khi cua he snippets", "tho cua he snippets", "thao cua he snippets", "kho cua che snippets", "kho cua te snippets", "kho cua le 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: (((("kho cua he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("kho cua he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( kho cua he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("kho cua he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.