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