Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khen cua cu snippets" » "khien cua cu snippets", "khan cua cu snippets", "khen ca cu snippets", "khen cua chu snippets", "khen cua su snippets", "khen cua co 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: (((("khen cua cu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khen cua cu snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khen cua cu snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khen cua cu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.