Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"lieu han cho snippets" » "lieu phan cho snippets", "lieu huan cho snippets", "lieu van cho snippets", "lieu hang cho snippets", "lieu han che snippets", "lieu san 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: (((("lieu han cho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("lieu han cho snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( lieu han cho snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("lieu han cho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.