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