Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"lan dan dong snippets" » "lan van dong snippets", "lan dan dung snippets", "lan dao dong snippets", "ban dan dong snippets", "van dan dong snippets", "lan dau dong 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 dan dong 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 dan dong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( lan dan dong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("lan dan dong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.