Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"lan hanh he snippets" » "ban hanh he snippets", "van hanh he snippets", "lan anh he snippets", "lan hanh che snippets", "lan hanh ve snippets", "lan hanh de 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 hanh he 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 hanh he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( lan hanh he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("lan hanh he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.