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