Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"duc hai doc snippets" » "duc hai code snippets", "cuc hai doc snippets", "duc dai doc snippets", "duc hau doc snippets", "duc bai doc snippets", "duc hai huoc snippets", "duc than doc 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: (((("python using java snippets") or ("duc hai doc snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python using java snippets") OR ("duc hai doc snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( python using java snippets ) or ( duc hai doc snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python using java snippets") or ("duc hai doc snippets"))) or ("locating bug core snippets"))*.