Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duoc lam con snippets" » "duoc pham con snippets", "duoc ly con snippets", "duoc li con snippets", "duoc lam son snippets", "duoc lam co snippets", "duoc la con 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: (((("duoc lam con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duoc lam con snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duoc lam con snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duoc lam con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.