Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"trong cao so snippets" » "truong cao so snippets", "trong cac so snippets", "trong ca so snippets", "trong cao son snippets", "trong co so snippets", "trong cao su 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: (((("trong cao so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("trong cao so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( trong cao so snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trong cao so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.