Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phan thi lon snippets" » "pham thi lon snippets", "tran thi lon snippets", "phan tu lon snippets", "phan thi loan snippets", "phan thit lon snippets", "phan thi lan 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: (((("phan thi lon snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("phan thi lon snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phan thi lon snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phan thi lon snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.