Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"luan quoc de snippets" » "luan nuoc de snippets", "luat quoc de snippets", "quan quoc de snippets", "luan quoc te snippets", "luan buoc de snippets", "luan quoc ve 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: (((("luan quoc de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("luan quoc de snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( luan quoc de snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luan quoc de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.