Perhaps you should try some spelling variations:
chuong trinh » cong trinh
trinh chao » trinh chat, trinh han, trinh co
trinh cau » trinh chat, trinh tu, trinh han
soi viet » hoi viet, oi viet, doi viet
cay cong » cac cong, cao cong, cau cong
dao hanh » dao thanh, dang hanh, dao van
ban hanh » ban hang
so viet » hoc viet
cao cau » cao cap, co cau, ca cau
va caoc » va cac, va cuoc, va cao
tao cau » tao cu, tao cao, tao sau
lan va » luan va, lanh va, lan van
co hoi » co loi
tay o » tay 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 ((dao hanh) or (ban hanh)) va ((cao cau) or (tao cau)) ((co hoi) or (co hoc)) viet nam ) or ( chuong ((trinh cau) or (trinh chao)) lan va caoc ((tay o) or (cay cong)) ((soi viet) OR (so viet)) nam ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( chuong trinh ((dao hanh) OR (ban hanh)) va ((cao cau) OR (tao cau)) ((co hoi) OR (co hoc)) viet nam ) OR ( chuong ((trinh cau) OR (trinh chao)) lan va caoc ((tay o) OR (cay cong)) ((soi viet) OR (so viet)) nam )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( chuong trinh ((dao hanh) or (ban hanh)) va ((cao cau) or (tao cau)) ((co hoi) or (co hoc)) viet nam ) or ( chuong ((trinh cau) or (trinh chao)) lan va caoc ((tay o) or (cay cong)) ((soi viet) OR (so viet)) nam ))".
• Adding a wildcard symbol may retrieve word variants: (( chuong trinh ((dao hanh) or (ban hanh)) va ((cao cau) or (tao cau)) ((co hoi) or (co hoc)) viet nam ) or ( chuong ((trinh cau) or (trinh chao)) lan va caoc ((tay o) or (cay cong)) ((soi viet) OR (so viet)) nam ))*.