Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dau nuoc he snippets" » "dat nuoc he snippets", "dau ngoc he snippets", "cap nuoc he snippets", "dau nuoc khe snippets", "dau nuoc ve snippets", "dau nuoc ha 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: (((("dau nuoc he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dau nuoc he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dau nuoc he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dau nuoc he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.