Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"cong luat du snippets" » "cong luat code snippets", "cong suat du snippets", "cong luan du snippets", "cuong luan du snippets", "cong luat dau snippets", "cong luat su snippets", "cong luat 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: (((("cong luat 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 luat du snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( cong luat du snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong luat du snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.