Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cong lam so snippets" » "nong lam so snippets", "cong nam so snippets", "cong lap so snippets", "cong lam son snippets", "cong ham so 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: (((("cong lam 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: (((("cong lam so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong lam so snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong lam so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.