Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"tang cua doc snippets" » "tang cua code snippets", "mang cua doc snippets", "hang cua doc snippets", "tang luan doc snippets", "tang cua duoc snippets", "tang cua duc snippets", "tang cua hoc 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: (((("tang cua doc snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tang cua doc snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( tang cua doc snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tang cua doc snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.