Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data snippets"
"can hoc nhap snippets" » "can hoi nhap snippets", "can hoc phap snippets", "can hoa nhap snippets", "van hoc nhap snippets", "dan hoc nhap snippets", "cao hoc nhap 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: (((("can hoc nhap snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("can hoc nhap snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( can hoc nhap snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("can hoc nhap snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.