Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dong tre can snippets" » "dong tren can snippets", "dong tri can snippets", "dong trieu can snippets", "dong tre dan snippets", "dong tiep can snippets", "dong tiem can 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 tre can 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 tre can snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong tre can snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong tre can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.