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