Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"son vinh da snippets" » "son binh da snippets", "son tinh da snippets", "cong vinh da snippets", "son vinh ha snippets", "son dinh da 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: (((("son vinh 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: (((("son vinh da snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( son vinh da snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("son vinh da snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.