Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"cao van hoe snippets" » "cao van code snippets", "cac van hoe snippets", "dao van hoe snippets", "cao dang hoe snippets", "cao van hoa snippets", "cao van hoc snippets", "cao van hieu 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 hoe 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 hoe snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( cao van hoe snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cao van hoe snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.