Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dong gom cac snippets" » "dong goi cac snippets", "dong giam cac snippets", "dong co cac snippets", "dong nom cac snippets", "dong ngon 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: (((("dong gom 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: (((("dong gom cac snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong gom cac snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong gom cac snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.