Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thuoc tan he snippets" » "thuoc tai he snippets", "thuoc ban he snippets", "thuoc tren he snippets", "thuoc toan he snippets", "thuoc tan ha snippets", "thuoc dan 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: (((("thuoc tan 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: (((("thuoc tan he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thuoc tan he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thuoc tan he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.