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