Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tang van cai snippets" » "dang van cai snippets", "hoang van cai snippets", "trong van cai snippets", "tang van hai snippets", "tang van chi snippets", "tang van cau 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: (((("tang van cai snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tang van cai snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tang van cai snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tang van cai snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.