Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dong luan le snippets" » "dung luan le snippets", "tong luan le snippets", "dong xuan le snippets", "dong luan len snippets", "dong tuan le snippets", "dong luan ve 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: (((("dong luan 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: (((("dong luan le snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong luan le snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong luan le snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.