Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"que toi cua snippets" » "que tai cua snippets", "quen voi cua snippets", "quen tot cua snippets", "que troi cua snippets", "que tri cua snippets", "que hoi cua 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: (((("que toi cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("que toi cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( que toi cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("que toi cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.