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