Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"duc dan cu snippets" » "duc dan code snippets", "duoc dan cu snippets", "duc tan cu snippets", "duc dai cu snippets", "duc dan cua snippets", "duc dan ca snippets", "duc dan su 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: (((("duc dan cu snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duc dan cu snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( duc dan cu snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc dan cu snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.