Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"vao cong du snippets" » "va cong du snippets", "cao cong du snippets", "van cong du snippets", "vao cong dau snippets", "vao cong duc snippets", "vao cong duy 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 cong du 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 cong du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( vao cong du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("vao cong du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.