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