Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van duoc cac snippets" » "van duc cac snippets", "vat duoc cac snippets", "tan duoc cac snippets", "van cuoc cach snippets", "van duoc chat snippets", "van duong cac 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 duoc 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 duoc cac snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van duoc cac snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van duoc cac snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.