Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phi tan cua snippets" » "phi san cua snippets", "phi tai cua snippets", "phi van cua snippets", "phi than cua snippets", "phi tang cua snippets", "phi toan cua 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 tan cua 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 tan cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phi tan cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phi tan cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.