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