Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"diem cua du snippets" » "dieu cua du snippets", "diem ca du snippets", "dien cua du snippets", "diem cua duc snippets", "diem cua ndu snippets", "diem cua su 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: (((("diem cua du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("diem cua du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( diem cua du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("diem cua du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.