Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hat dieu can snippets" » "han dieu can snippets", "sat dieu can snippets", "thuat dieu can snippets", "hat dieu hanh snippets", "hat tiep can snippets", "hat dieu 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: (((("hat dieu can 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 dieu can snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hat dieu can snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hat dieu can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.