Perhaps you should try some spelling variations:
last first » act first, must first
liang tan » liang dan, wing tan
liang sun » liang dan, wing sun
first yeo » first year, first do, first e
yeo chang » ceo zhang, lee chang, po chang
dong di » dong sin
chang c » chang _, anhang c, chang ha
a last » _ last, a las
et a » et al, et la, e a

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((((liang tan) or (liang sun))) or (dong di)) et a last first yeo chang c ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((liang tan) OR (liang sun))) OR (dong di)) et a last first yeo chang c ;*.