Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"lan khoi de snippets" » "lan kho de snippets", "van khoi de snippets", "dang khoi de snippets", "lan khi de snippets", "lan khoa de snippets", "lan khoi he 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: (((("lan khoi de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("lan khoi de snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( lan khoi de snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("lan khoi de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.