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