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