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