Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tan van canh snippets" » "tan van anh snippets", "tan van hanh snippets", "tan van manh snippets", "tran van canh snippets", "tang van canh snippets", "luan van canh 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: (((("tan van canh snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tan van canh snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tan van canh snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tan van canh snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.