Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"de phan tong snippets" » "de phan trong snippets", "de phan cong snippets", "de han tong snippets", "d phan tong snippets", "de phap tong snippets", "de phat tong 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: (((("de phan tong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("de phan tong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( de phan tong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("de phan tong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.