Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hoat du hoc snippets" » "hoa du hoc snippets", "hoai duc hoc snippets", "hoat doi hoc snippets", "hoat tu hoc snippets", "hoat duoc hoc 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: (((("hoat du hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hoat du hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hoat du hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hoat du hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.