Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hoc kham so snippets" » "goc kham so snippets", "hoc khac so snippets", "hoc nham so snippets", "hoc ham so snippets", "hoc cham soc snippets", "hoc khac son 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: (((("hoc kham 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: (((("hoc kham so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hoc kham so snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hoc kham so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.