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