Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"pham mat hoc snippets" » "ham mat hoc snippets", "pham ma hoc snippets", "cham mat hoc snippets", "pham vat hoc snippets", "pham chat hoc snippets", "pham mach hoc 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: (((("pham mat hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("pham mat hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( pham mat hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("pham mat hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.