Perhaps you should try some spelling variations:
phase robert » chase robert, case robert, hale robert
using phase » using past, closing phase, testing phase
time age » time wage, time usage, time a
tan yang » dan yang, tan ying, tan yong
robert b » robert _, robert e, robert j
un yang » daun yang, dan yang, hui yang

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tan yang) or (un yang)) i ((time age) OR (prime age)) using phase robert b ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tan yang) OR (un yang)) i ((time age) OR (prime age)) using phase robert b ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tan yang) or (un yang)) i ((time age) OR (prime age)) using phase robert b ;*".