Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thu hoai le snippets" » "thi hoai le snippets", "thu hai le snippets", "thu hoan le snippets", "thu hoa le snippets", "thu hoai ve 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 le 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 le snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thu hoai le snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thu hoai le snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.