Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cong linh du snippets" » "cuong linh du snippets", "cong vinh du snippets", "cong tinh du snippets", "cong dinh du snippets", "cong linh tu snippets", "cong minh duc 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: (((("cong linh du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cong linh du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong linh du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong linh du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.