Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"bac vinh son snippets" » "bac ninh son snippets", "bac kinh son snippets", "bac tinh son snippets", "bac minh son snippets", "bac dinh 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: (((("bac vinh son snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("bac vinh son snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( bac vinh son snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("bac vinh son snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.