Perhaps you should try some spelling variations:
trinh cham » trinh chat, trinh chao, trinh han
trinh may » trinh ky, trinh han, trinh ly
trinh cau » trinh chat, trinh chao, trinh tu
may doanh » vay doanh, ly doanh, van doanh
hai viet » thai viet, mai viet, tai viet
cham anh » pham anh, pham hanh, cham binh
dai viet » mai viet, dao viet, tai viet
doanh va » doan va, doanh tai, doanh cua
cac cau » cac mau, bac cau, ca cau
hanh va » hang va, hanh vi
danh va » dan va, dang va, dinh va
cac cap » cac cam, cac cay, cac tap
cao cap » cao chat
co hoi » co loi
va cao » va co, va dao, va bao
cau co » cau do, cac co, cay co
co dai » co dan, do dai
o hai » co hai, so hai, o lai
cap o » cap do, cap 2, cap 1

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (( cong trinh may doanh va cac cap ((co hoi) OR (co hoc)) viet nam ) or ((( chuong trinh cham anh va cao cap o hai viet nam ) or ( chuong trinh cau ((danh va) or (hanh va)) cac cau co dai viet nam ))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( cong trinh may doanh va cac cap ((co hoi) OR (co hoc)) viet nam ) OR ((( chuong trinh cham anh va cao cap o hai viet nam ) OR ( chuong trinh cau ((danh va) OR (hanh va)) cac cau co dai viet nam )))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( cong trinh may doanh va cac cap ((co hoi) OR (co hoc)) viet nam ) or ((( chuong trinh cham anh va cao cap o hai viet nam ) or ( chuong trinh cau ((danh va) or (hanh va)) cac cau co dai viet nam ))))".
• Adding a wildcard symbol may retrieve word variants: (( cong trinh may doanh va cac cap ((co hoi) OR (co hoc)) viet nam ) or ((( chuong trinh cham anh va cao cap o hai viet nam ) or ( chuong trinh cau ((danh va) or (hanh va)) cac cau co dai viet nam ))))*.