Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dong san tre snippets" » "cong san tre snippets", "dong bang tre snippets", "dong von tre snippets", "dong ban tre snippets", "dong van tren snippets", "dong dan tren 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 san tre 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 san tre snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong san tre snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong san tre snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.