Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tao van cong snippets" » "tao van dong snippets", "tao van phong snippets", "tao phan cong snippets", "thao van cong snippets", "tao va cong snippets", "dao van cong 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: (((("tao van cong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tao van cong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tao van cong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tao van cong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.