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