Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nhac van le snippets" » "nha van le snippets", "nhac dan le snippets", "nhan van le snippets", "nhac van de snippets", "nhac ban le 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: (((("nhac van le snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nhac van le snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nhac van le snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nhac van le snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.