Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"luc cao cong snippets" » "luc cao code snippets", "luc cac cong snippets", "luc cao dang snippets", "luc cua cong snippets", "luc cho cong snippets", "luc canh cong snippets", "quoc cao cong 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: (((("luc cao cong snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("luc cao cong snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( luc cao cong snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luc cao cong snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.