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