Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thi van che snippets" » "thi lan che snippets", "thi hanh che snippets", "thi nang che snippets", "thi han che snippets", "thi van chi snippets", "thi van cho 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 van che 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 van che snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thi van che snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thi van che snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.