Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khao cuu doc snippets" » "cham cuu doc snippets", "chao chu doc snippets", "kho cua doc snippets", "khao cuu duoc snippets", "khao cuu dac snippets", "khao cuu 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: (((("khao cuu doc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khao cuu doc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khao cuu doc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khao cuu doc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.