Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khoi de so snippets" » "khi de so snippets", "khoa de so snippets", "khoi he so snippets", "khoi de co snippets", "khoi de mo snippets", "khoi de bo 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: (((("khoi de 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: (((("khoi de so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khoi de so snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoi de so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.