Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ngu phi cong snippets" » "ngu thi cong snippets", "ngu phan cong snippets", "ngu pham cong snippets", "ngu phu cong snippets", "nguoi phi cong snippets", "nguon phi 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: (((("ngu phi cong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("ngu phi cong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ngu phi cong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ngu phi cong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.