Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cong vang so snippets" » "cong lang so snippets", "cong quang so snippets", "cong ngang so snippets", "cong lang son snippets", "cong bang son snippets", "cong dang son 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 vang 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 vang so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong vang so snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong vang so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.