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