Perhaps you should try some spelling variations:
chuong trinh » cong trinh
trinh cac » trinh chat, trinh chao, trinh cham
trinh cau » trinh chat, trinh chao, trinh tu
lanh sao » lanh dao, lanh sang, anh so
doi viet » dai viet, hoi viet, do viet
soi viet » so viet, hoi viet, noi viet
cac cap » cao cap, cac cam, cac cau
sao cac » sat cac, tao cac
oi viet » hoi viet, o viet, cuoi viet
cao anh » cao dang, cao tang, cao bang
cac dai » cac dan, cac bai, can dai
cac anh » cac banh, ca anh, cac nganh
dai co » mai co, dai so, tai co
cap do » cau do
do oi » do moi, do voi, do o

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 ((cac anh) or (cao anh)) va cac dai co ((soi viet) OR (doi viet)) nam ) or ( chuong ((trinh cac) or (trinh cau)) lanh sao cac cap do oi viet nam ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( chuong trinh ((cac anh) OR (cao anh)) va cac dai co ((soi viet) OR (doi viet)) nam ) OR ( chuong ((trinh cac) OR (trinh cau)) lanh sao cac cap do oi viet nam )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( chuong trinh ((cac anh) or (cao anh)) va cac dai co ((soi viet) OR (doi viet)) nam ) or ( chuong ((trinh cac) or (trinh cau)) lanh sao cac cap do oi viet nam ))".
• Adding a wildcard symbol may retrieve word variants: (( chuong trinh ((cac anh) or (cao anh)) va cac dai co ((soi viet) OR (doi viet)) nam ) or ( chuong ((trinh cac) or (trinh cau)) lanh sao cac cap do oi viet nam ))*.