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