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