Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duoc lam det snippets" » "duoc pham det snippets", "duoc ly det snippets", "duoc li det snippets", "duoc lam dat snippets", "duoc lam dep snippets", "duoc lam ket 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 det 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 det snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duoc lam det snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duoc lam det snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.