Perhaps you should try some spelling variations:
trinh cao » trinh chao, trinh co, trinh cau
trinh cay » trinh cau, trinh may, trinh cac
cuoi viet » nguoi viet, nuoc viet, cua viet
thai viet » thi viet, tai viet, mai viet
cam cong » cac cong, cao cong, cau cong
dang van » hoang van, hang va
trinh do » trinh ky
cay lanh » cay lam, cay dan
lanh van » lang van, anh van, lanh va
co viet » so viet, o viet, hoc viet
cao lan » cao van, cao dang, cao tang
van cac » van hac, van cau, van bac
oi viet » hoi viet, o viet, gioi viet
do dang » da dang, do danh, xo dang
cac cam » cad cam, cac cap, cac cau
cam co » cac co, nam co, cay co
lan va » luan va, lanh va, lan van
cong n » cong _, cong o, cong san

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((( cong trinh cao lan va cac cam co ((thai viet) or (co viet)) nam ) or ( cong trinh cay lanh van cac cam co ((oi viet) OR (cuoi viet)) nam ))) or ( cong trinh do dang van cac cam cong n((oi viet) OR (cuoi viet)) nam ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((( cong trinh cao lan va cac cam co ((thai viet) OR (co viet)) nam ) OR ( cong trinh cay lanh van cac cam co ((oi viet) OR (cuoi viet)) nam ))) OR ( cong trinh do dang van cac cam cong n((oi viet) OR (cuoi viet)) nam )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((( cong trinh cao lan va cac cam co ((thai viet) or (co viet)) nam ) or ( cong trinh cay lanh van cac cam co ((oi viet) OR (cuoi viet)) nam ))) or ( cong trinh do dang van cac cam cong n((oi viet) OR (cuoi viet)) nam ))".
• Adding a wildcard symbol may retrieve word variants: (((( cong trinh cao lan va cac cam co ((thai viet) or (co viet)) nam ) or ( cong trinh cay lanh van cac cam co ((oi viet) OR (cuoi viet)) nam ))) or ( cong trinh do dang van cac cam cong n((oi viet) OR (cuoi viet)) nam ))*.