Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"biet den hoc snippets" » "biet de hoc snippets", "biet dung hoc snippets", "bieu dien hoc snippets", "biet dien hoc snippets", "biet dan 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: (((("biet den 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 den hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( biet den hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("biet den hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.