Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thu hoai so snippets" » "thi hoai so snippets", "thu hai so snippets", "thu hoan so snippets", "thu hoi so snippets", "thu hoai bao 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: (((("thu hoai so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("thu hoai so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thu hoai so snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thu hoai so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.