Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"det cua toan snippets" » "det cuu toan snippets", "det xuan toan snippets", "det cua thanh snippets", "de cua toan snippets", "dat cua toan snippets", "dep cua toan 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: (((("det cua toan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("det cua toan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( det cua toan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("det cua toan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.