Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"du hieu tin snippets" » "du lieu tin snippets", "du hieu tieng snippets", "du chieu tinh snippets", "duc hieu tin snippets", "de hieu tin snippets", "du hieu tin 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: (((("du hieu tin snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("du hieu tin snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( du hieu tin snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("du hieu tin snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.