Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"che duc tre snippets" » "che duoc tre snippets", "chu duc tre snippets", "chet duoc tre snippets", "che duoc tren snippets", "che duc tien 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: (((("che duc 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: (((("che duc tre snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( che duc tre snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("che duc tre snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.