Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"den de cua snippets" » "den dem cua snippets", "den do cua snippets", "dan de cua snippets", "den le cua snippets", "den te cua snippets", "den dieu cua 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: (((("den de cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("den de cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( den de cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("den de cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.