Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hoc dai nghe snippets" » "hoc day nghe snippets", "hoc bai nghe snippets", "hoc da nghe snippets", "hoc dan nghe 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 dai nghe 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 dai nghe snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hoc dai nghe snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hoc dai nghe snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.