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