Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"chao xu cac snippets" » "chao xu code snippets", "chao tu cac snippets", "chao xu bac snippets", "chao eu cac snippets", "cho xu cac snippets", "cao xu cac snippets", "chat xu cac snippets"
"python using java snippets" » "python using data 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: (((("chao xu cac snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("chao xu cac snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( chao xu cac snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("chao xu cac snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.