Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"son duc hieu snippets" » "son doc hieu snippets", "son duc hien snippets", "son thuc hieu snippets", "ton duc hieu snippets", "hong duc hieu snippets", "cong duc hieu snippets", "son duc hieu 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: (((("son duc hieu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("son duc hieu snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( son duc hieu snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("son duc hieu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.