Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"hoc dua doan snippets" » "hoc dua code snippets", "hoc du doan snippets", "hoc quan doan snippets", "hoc cua doanh snippets", "hoc cua doan snippets", "hoc duc doan snippets", "hoc lua doan 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: (((("hoc dua doan snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hoc dua doan snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( hoc dua doan snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hoc dua doan snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.