Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"cong duy doc snippets" » "cong duy code snippets", "cong quy doc snippets", "cong duc doc snippets", "cong dung doc snippets", "cong day doc snippets", "cong duy dac snippets", "cong duy dot 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: (((("cong duy doc snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cong duy doc snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( cong duy doc snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong duy doc snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.