Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nhat vi hoc snippets" » "nhat ve hoc snippets", "phat vi hoc snippets", "hat vi hoc snippets", "nhat li hoc snippets", "nhat va hoc 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: (((("nhat vi hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nhat vi hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nhat vi hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nhat vi hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.