Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"tra cua hoc snippets" » "tra cua code snippets", "trau cua hoc snippets", "trua cua hoc snippets", "tra cuu hoc snippets", "tra cua hoi snippets", "tra cua thuoc snippets", "tra cua nuoc 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: (((("tra cua hoc snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tra cua hoc snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( tra cua hoc snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tra cua hoc snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.