Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc hieu hoc snippets" » "doc hieu hoc snippets", "duc hien hoc snippets", "thuc hieu hoc snippets", "duc lieu hoc snippets", "duc hieu hoa snippets", "duc tieu 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: (((("duc hieu 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: (((("duc hieu hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc hieu hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc hieu hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.