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