Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"cong viet du snippets" » "cong viet code snippets", "cong viec du snippets", "thong viet du snippets", "nang viet du snippets", "cong viet duc snippets", "cong viet duy snippets", "cong viet tu 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: (((("python using java snippets") or ("cong viet du snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python using java snippets") OR ("cong viet du snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( python using java snippets ) or ( cong viet du snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python using java snippets") or ("cong viet du snippets"))) or ("locating bug core snippets"))*.