Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"luong van co snippets" » "luong va co snippets", "duong van co snippets", "luong vat co snippets", "luong van cho snippets", "luong ban co snippets", "luong san 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: (((("luong van co snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("luong van co snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( luong van co snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luong van co snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.