Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duoc dan che snippets" » "duc dan che snippets", "duoc ban che snippets", "duoc dai che snippets", "duoc han che snippets", "duoc dan cho snippets", "duoc dan he 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: (((("duoc dan che snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duoc dan che snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duoc dan che snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duoc dan che snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.