Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"cong tao voi snippets" » "cong tao code snippets", "cong tac voi snippets", "cong tan voi snippets", "cong bao voi snippets", "cong tao boi snippets", "cong tao hoi snippets", "cong dao voi 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 tao voi 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 tao voi snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( cong tao voi snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong tao voi snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.