Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cheng so dk snippets" » "cong so dk snippets", "phong so dk snippets", "cheng lu dk snippets", "cheng so du snippets", "cheng so do 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 so dk 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 so dk snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cheng so dk snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cheng so dk snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.