Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"deu hanh cho snippets" » "dieu hanh cho snippets", "du hanh cho snippets", "den hanh cho snippets", "deu danh cho snippets", "deu han cho snippets", "deu hang cho 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: (((("deu hanh cho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("deu hanh cho snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( deu hanh cho snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("deu hanh cho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.