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