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