Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"tran duy doc snippets" » "tran duy code snippets", "tran duc doc snippets", "tran quy doc snippets", "tran thuy doc snippets", "tran day doc snippets", "tran duy dac snippets", "tran 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: (((("tran 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: (((("tran duy doc snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( tran duy doc snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tran duy doc snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.