Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dong thuc da snippets" » "dong thuoc da snippets", "duong thuc da snippets", "cong thuc da snippets", "dong thuc dan snippets", "dong thuc day snippets", "dong thuc dia 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: (((("dong thuc da snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dong thuc da snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong thuc da snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong thuc da snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.