Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tin van canh snippets" » "tin van anh snippets", "tin van hanh snippets", "tin van manh snippets", "tien van canh snippets", "tan van canh snippets", "tin va 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: (((("tin 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: (((("tin van canh snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tin van canh snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tin van canh snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.