Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"luc thuoc so snippets" » "truc thuoc so snippets", "luc hoc so snippets", "cua thuoc so snippets", "luc thuoc bo snippets", "luc thuoc ho snippets", "luc thuoc co 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: (((("luc thuoc so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("luc thuoc so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( luc thuoc so snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luc thuoc so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.