Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"hieu cua do snippets" » "hieu cua code snippets", "hieu qua do snippets", "dieu cua do snippets", "bieu cua do snippets", "hieu cua dao snippets", "hieu cua bo snippets", "hieu cua co 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: (((("hieu cua do snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hieu cua do snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( hieu cua do snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hieu cua do snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.