Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"cong than vo snippets" » "cong than code snippets", "cong thanh vo snippets", "cong thang vo snippets", "cong tan vo snippets", "cong than va snippets", "cong than doc snippets", "cong than hoc 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: (((("cong than vo snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cong than vo snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( cong than vo snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong than vo snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.