Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"lan tu che snippets" » "lan thu che snippets", "lanh tu che snippets", "ban tu che snippets", "lan tu chu snippets", "lan tu chi snippets", "lan ty che 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 tu 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 tu che snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( lan tu che snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("lan tu che snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.