Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van ngoc phe snippets" » "tran ngoc phe snippets", "van hoc phe snippets", "van nghe phe snippets", "van ngoc phan snippets", "van ngoc them snippets", "van ngoc phac 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: (((("van ngoc phe snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("van ngoc phe snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van ngoc phe snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van ngoc phe snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.