Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"hieu dan cua snippets" » "hieu dan code snippets", "hieu van cua snippets", "sieu dan cua snippets", "hieu dac cua snippets", "hieu dan ca snippets", "hieu ban cua snippets", "hieu dai 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: (((("hieu dan 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: (((("hieu dan cua snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( hieu dan cua snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hieu dan cua snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.