Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"han dai hoi snippets" » "phan dai hoi snippets", "nhan dai hoi snippets", "han tai hoi snippets", "han dai hoc snippets", "han dai hai snippets", "han dai moi snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core 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: (((("han dai hoi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("han dai hoi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( han dai hoi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("han dai hoi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.