Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dong le doan snippets" » "duong le doan snippets", "dung le doan snippets", "hong le doan snippets", "dong le dan snippets", "dong ly doanh snippets", "dong le hoang 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 le doan 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 le doan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong le doan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong le doan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.