Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cheng yi can snippets" » "cheng lin can snippets", "zheng yii can snippets", "chen yu can snippets", "cheng i can snippets", "cheng ki can snippets", "cheng yi fan 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 yi can 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 yi can snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cheng yi can snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cheng yi can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.