Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tao lieu doi snippets" » "tai lieu doi snippets", "tao dieu doi snippets", "tao lien doi snippets", "tao lieu boi snippets", "tao lieu voi snippets", "tao lieu dai snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core 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: (((("tao lieu doi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tao lieu doi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tao lieu doi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tao lieu doi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.