Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"doan vi hoe snippets" » "doan va hoe snippets", "don vi hoe snippets", "doan thi hoe snippets", "doan vi hoc snippets", "doan vi he 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: (((("doan vi hoe snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("doan vi hoe snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doan vi hoe snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doan vi hoe snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.