Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thi hien o2 snippets" » "thi lien o2 snippets", "thi huyen o2 snippets", "thi hue o2 snippets", "thi hien hop snippets", "thi hien loi snippets", "thi hien ton 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 hien o2 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 hien o2 snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thi hien o2 snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thi hien o2 snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.