Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phi bo cong snippets" » "phi so cong snippets", "phi cao cong snippets", "phi hoc cong snippets", "thi bo cong snippets", "pha bo 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: (((("phi bo 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: (((("phi bo cong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phi bo cong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phi bo cong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.