Perhaps you should try some spelling variations:
structured microarray » structure microarray, directed microarray
program structured » programs structured, program structure, program structures
reference method » difference method, difference methods
microarray chips » microarray chip, microarrays chip, microarray cross
method program » methods program, method programs, method programmed

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: reference method program structured microarray chips~.
• Adding a wildcard symbol may retrieve word variants: reference method program structured microarray chips*.