Perhaps you should try some spelling variations:
chuong trinh » cong trinh
trinh chao » trinh chat, trinh co, trinh giao
trinh cau » trinh chat, trinh tu, trinh tai
trinh han » trinh quan
dao hanh » dao thanh, dang hanh, dao van
ban hanh » ban hang
soi viet » hoi viet, oi viet, doi viet
cao hanh » cao anh, bao hanh, cao danh
cac cam » cad cam, cac cap, cac cau
van cac » van hac, van cau, van bac
cac tai » cao tai, cac bai, cac dai
so viet » hoc viet
lan van » luan van, lang van, tan van
tai co » mai co, tai so, tri co
cam co » cac co, nam co, cay co

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 hanh) or (((dao hanh) or (ban hanh)))) va cac cam co ((soi viet) or (so viet)) nam ) or ( chuong ((((trinh cau) OR (trinh han))) or (trinh chao)) lan van cac tai co ((soi viet) or (so viet)) nam ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( chuong trinh ((cao hanh) OR (((dao hanh) OR (ban hanh)))) va cac cam co ((soi viet) OR (so viet)) nam ) OR ( chuong ((((trinh cau) OR (trinh han))) OR (trinh chao)) lan van cac tai co ((soi viet) OR (so viet)) nam )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( chuong trinh ((cao hanh) or (((dao hanh) or (ban hanh)))) va cac cam co ((soi viet) or (so viet)) nam ) or ( chuong ((((trinh cau) OR (trinh han))) or (trinh chao)) lan van cac tai co ((soi viet) or (so viet)) nam ))".
• Adding a wildcard symbol may retrieve word variants: (( chuong trinh ((cao hanh) or (((dao hanh) or (ban hanh)))) va cac cam co ((soi viet) or (so viet)) nam ) or ( chuong ((((trinh cau) OR (trinh han))) or (trinh chao)) lan van cac tai co ((soi viet) or (so viet)) nam ))*.