Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"danh du hoi snippets" » "danh du code snippets", "danh dau hoi snippets", "danh tu hoi snippets", "dinh du hoi snippets", "danh du hoc snippets", "danh lu hoi snippets", "danh di hoi 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: (((("danh du hoi snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("danh du hoi snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( danh du hoi snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("danh du hoi snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.