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