Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thi khanh di snippets" » "thi thanh di snippets", "thi hanh di snippets", "thi anh di snippets", "thi khanh bui snippets", "thi thanh doi snippets", "thi hanh de 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: (((("thi khanh di snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("thi khanh di snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thi khanh di snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thi khanh di snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.