Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khen cua co snippets" » "khien cua co snippets", "khan cua co snippets", "khen ca co snippets", "khen cua bo snippets", "khen cua cong 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 co 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 co snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khen cua co snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khen cua co snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.