Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phu hung con snippets" » "phu chung con snippets", "phi hung con snippets", "phu tung con snippets", "phu nhung con snippets", "phu dung con snippets", "phu nhung cong 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: (((("phu hung con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("phu hung con snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phu hung con snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phu hung con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.