Perhaps you should try some spelling variations:
chuong trinh » cong trinh
trinh cao » trinh chao, trinh co, tinh cao
trinh cau » trinh chat, trinh chao, trinh tu
cao lanh » cao lan, cao anh, cao danh
doi viet » dai viet, hoi viet, do viet
soi viet » so viet, hoi viet, noi viet
cac cho » cap cho, cao cho, dac cho
cac cac » cac cach, ca cac, cac bac
cau lan » cau lanh, cao lan, sau lan
oi viet » hoi viet, o viet, cuoi viet
lanh va » hanh va, anh va, lanh dao
cac cay » ca cay, cac cam, cac cap
cho doi » cho moi, cuoc doi, cho tuoi
lan va » luan va, lan van, lang va
cay co » tay co, cay cong
cac co » cac cong
co doi » co dot, co dai, co hoi

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