Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"doc thuoc do snippets" » "hoc thuoc do snippets", "doc thuc do snippets", "don thuoc do snippets", "doc thuoc bo snippets", "doc thuoc ho snippets", "doc thuoc co 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: (((("doc thuoc do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("doc thuoc do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doc thuoc do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doc thuoc do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.