Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"tra cong cua snippets" » "tra cong code snippets", "tran cong cua snippets", "trao cong cua snippets", "trang cong cua snippets", "tra cong cu snippets", "tra dong cua snippets", "tra huong cua 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 cong cua 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 cong cua snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( tra cong cua snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tra cong cua snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.