Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"him lam dan snippets" » "tim lam dan snippets", "nhom lam dan snippets", "diem lam dan snippets", "him nam dan snippets", "him lam san snippets", "him lam dau snippets", "him lam dan slippers"
"locating bug code snippets" » "locating bug code slippers", "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: (((("him lam dan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("him lam dan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( him lam dan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("him lam dan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.