Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"dat hieu do snippets" » "dat hieu code snippets", "dao hieu do snippets", "dat tieu do snippets", "rat nhieu do snippets", "dat hieu so snippets", "dat hieu bo snippets", "dat bieu do 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: (((("dat hieu 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: (((("dat hieu do snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( dat hieu do snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dat hieu do snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.