Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thu sac cua snippets" » "thu sach cua snippets", "thu san cua snippets", "thu xac cua snippets", "thu tac cua snippets", "thu cac 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 sac 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 sac cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thu sac cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thu sac cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.