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