Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thu doc cua snippets" » "thu duc cua snippets", "thu dac cua snippets", "thu do cua snippets", "thu hoc cua snippets", "thu doi cua 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 doc cua 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 doc cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thu doc cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thu doc cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.