Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"pha du doc snippets" » "pha du code snippets", "pham duc doc snippets", "pham duy doc snippets", "phan duc doc snippets", "pha duy doc snippets", "pha du hoc snippets", "pha nu doc 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: (((("pha du 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: (((("pha du doc snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( pha du doc snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("pha du doc snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.