Perhaps you should try some spelling variations:
chuong trinh » cong trinh
thai viet » tai viet, mai viet, tai vien
trinh cao » trinh chao, trinh co, trinh cau
thi viet » thi lien
cay cong » cac cong, cao cong, cau cong
co thai » ca thai, co hai, co thi
do thai » do thi, toc thai
cua cay » cua cac
cao lan » cao van, cao dang, cao tang
va cua » va chua, via cua, ca cua
lan va » luan va, lanh va, lan van
lan co » lang co, lan cho, lanh co
co cua » con cua, ca cua, cong cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( chuong trinh cao lan va cua cay cong ((thai viet) or (thi viet)) nam ) or ( chuong trinh cao lan co cua cay ((co thai) or (do thai)) viet nam ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( chuong trinh cao lan va cua cay cong ((thai viet) OR (thi viet)) nam ) OR ( chuong trinh cao lan co cua cay ((co thai) OR (do thai)) viet nam )).
• Adding a wildcard symbol may retrieve word variants: (( chuong trinh cao lan va cua cay cong ((thai viet) or (thi viet)) nam ) or ( chuong trinh cao lan co cua cay ((co thai) or (do thai)) viet nam ))*.