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