Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"kiem cong co snippets" » "khiem cong co snippets", "kiem chong co snippets", "kiem hoang co snippets", "kiem dong co snippets", "kiem cong cu snippets", "kiem cong so 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: (((("kiem cong 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: (((("kiem cong co snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( kiem cong co snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("kiem cong co snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.