Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hat dung moi snippets" » "vat dung moi snippets", "dat dung moi snippets", "hai dung moi snippets", "hat dung mo snippets", "hat dung doi snippets", "hat dung mot 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: (((("hat dung moi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hat dung moi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hat dung moi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hat dung moi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.