Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"dung hoc doi snippets" » "dung hoc code snippets", "dong hoc doi snippets", "dung thuoc doi snippets", "trung hoc doi snippets", "dung hoc dai snippets", "dung hoc noi snippets", "dung hoc moi 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: (((("dung hoc doi snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung hoc doi snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( dung hoc doi snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung hoc doi snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.