Perhaps you should try some spelling variations:
chuong trinh » cong trinh
trinh chao » trinh chat, trinh han, trinh co
trinh cao » trinh co, tinh cao, trinh cho
trinh cau » trinh chat, trinh tu, trinh han
sco viet » so viet, sach viet, o viet
cao hang » cao dang, cao tang, cao bang
lanh va » hanh va, anh va, lanh dao
co viet » so viet, o viet, hoc viet
van cau » van dau, van hau, van chat
cac cau » cac mau, bac cau, ca cau
cay co » cac co, cay cong
tay co » ty co
lan va » luan va, lan van, lang va
co co » co so, vo co, co 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 cao hang va ((cac cau) or (van cau)) co co viet nam ) or ( chuong ((trinh cau) or (trinh chao)) ((lan va) OR (lanh va)) cac ((((tay o) or (tay co))) or (cay co)) sco viet nam ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( chuong trinh cao hang va ((cac cau) OR (van cau)) co co viet nam ) OR ( chuong ((trinh cau) OR (trinh chao)) ((lan va) OR (lanh va)) cac ((((tay o) OR (tay co))) OR (cay co)) sco viet nam )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( chuong trinh cao hang va ((cac cau) or (van cau)) co co viet nam ) or ( chuong ((trinh cau) or (trinh chao)) ((lan va) OR (lanh va)) cac ((((tay o) or (tay co))) or (cay co)) sco viet nam ))".
• Adding a wildcard symbol may retrieve word variants: (( chuong trinh cao hang va ((cac cau) or (van cau)) co co viet nam ) or ( chuong ((trinh cau) or (trinh chao)) ((lan va) OR (lanh va)) cac ((((tay o) or (tay co))) or (cay co)) sco viet nam ))*.