Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"mat cua du snippets" » "ma cua du snippets", "manh cua du snippets", "mang cua du snippets", "mat cua duc snippets", "mat cua ndu snippets", "mat 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: (((("mat 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: (((("mat cua du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( mat cua du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("mat cua du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.