Perhaps you should try some spelling variations:
trinh chao » trinh chat, trinh han, trinh co
trinh cau » trinh chat, trinh tu, trinh han
thai viet » thi viet, tai viet, mai viet
cau lanh » cau danh, cay lanh, dau lanh
chao anh » cao anh, khao danh, chao yang
soi viet » hoi viet, oi viet, doi viet
co thai » do thai, ca thai, co hai
so viet » hoc viet
cao cam » cao cap, cao dam, cao chat
lanh va » hanh va, lanh dao, doanh va
cac cam » cac cap, cac cau, cac cay
cam co » cac co, nam co, cay co
anh va » hanh va
va cad » va cai, va cau, va cam
va cao » va co, va dao, va bao

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