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