Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"may van tuan snippets" » "may van quan snippets", "may van ban snippets", "may anh tuan snippets", "may san tuan snippets", "may va tuan snippets", "ma van tuan snippets", "may van tuan slippers"
"locating bug code snippets" » "locating bug code slippers", "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: (((("may van tuan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("may van tuan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( may van tuan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("may van tuan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.