Perhaps you should try some spelling variations:
"dong cac ham slippers" » "dong cac ham slices", "duong cac ham slippers", "dong bac ham slippers", "dung cac ham slippers", "dong cac cam slippers", "dong cac hat slippers", "dong cac nhan slippers"
"python using java snippets" » "python using data 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: (((("dong cac ham slippers") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dong cac ham slippers") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong cac ham slippers ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong cac ham slippers") or ("python using java snippets"))) or ("locating bug code snippets"))*.