Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"den kham cua snippets" » "den kha cua snippets", "dai kham cua snippets", "dan khai cua snippets", "den kham chua snippets", "den ham cua snippets", "den khan 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 kham 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 kham cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( den kham cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("den kham cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.