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