Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"van cong doi snippets" » "van cong code snippets", "van dong doi snippets", "van phong doi snippets", "phan cong doi snippets", "van vong doi snippets", "van cong dot snippets", "van cong goi 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 cong doi 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 cong doi snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( van cong doi snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van cong doi snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.