Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"biet van hoc snippets" » "viet van hoc snippets", "biet va hoc snippets", "biet lang hoc snippets", "biet van hoa 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: (((("biet van 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: (((("biet van hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( biet van hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("biet van hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.