Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"vao hoang so snippets" » "van hoang so snippets", "tao khoang so snippets", "van hoan so snippets", "vao hoang son snippets", "vao hoang o snippets", "vao hoang sa 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: (((("vao hoang so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("vao hoang so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( vao hoang so snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("vao hoang so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.