Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"den lay hoc snippets" » "den gay hoc snippets", "den lam hoc snippets", "den nay hoc snippets", "den ly hoc snippets", "den day hoc snippets", "den loai 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: (((("den lay 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: (((("den lay hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( den lay hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("den lay hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.