Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thuc dan due snippets" » "thuc hanh due snippets", "hoc dan due snippets", "thuc vat due snippets", "thuc dan de snippets", "thuc van due snippets", "thuc dan dung 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: (((("thuc dan due snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("thuc dan due snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thuc dan due snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thuc dan due snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.