Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cheng gi he snippets" » "cheng yi he snippets", "cheng lin he snippets", "nhung gi he snippets", "cheng gi de snippets", "cheng gi ve snippets", "cheng vi he 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: (((("cheng gi he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cheng gi he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cheng gi he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cheng gi he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.