Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phi voi nghe snippets" » "phi noi nghe snippets", "phi gioi nghe snippets", "phi van nghe snippets", "pho voi nghe snippets", "phi loi nghe snippets", "chi voi 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: (((("phi voi 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: (((("phi voi nghe snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phi voi nghe snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phi voi nghe snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.