Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nhat de du snippets" » "nhat ve du snippets", "nhat le du snippets", "chat deo du snippets", "nhat de dua snippets", "nhat te du 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: (((("nhat de du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nhat de du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nhat de du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nhat de du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.