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