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