Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nang van c1 snippets" » "dang van c1 snippets", "tang van c1 snippets", "lang van c1 snippets", "nang van ca snippets", "nang van co snippets", "nang van cu 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: (((("nang van c1 snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nang van c1 snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nang van c1 snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nang van c1 snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.