Perhaps you should try some spelling variations:
trinh chat » tinh chat, trinh luat, trinh han
trinh may » trinh ky, trinh han, trinh ly
pham hanh » pham thanh, pham anh, pham hang
trinh cau » trinh chao, trinh tu, trinh han
cuoi viet » nguoi viet, co viet, nuoc viet
may doanh » vay doanh, ly doanh, van doanh
hai viet » thai viet, mai viet, tai viet
dai viet » mai viet, dao viet, tai viet
cham anh » pham anh, cham binh, cham tinh
doanh va » doan va, doanh tai, doanh cua
do cuoi » do choi, dam cuoi, do nguoi
danh va » hanh va, anh va, dan va
cac cap » cao cap, cac cam, cac cau
cau co » cau do, cac co, dau co
cap do » cau do
cay co » cac co, tay co, cay cong
va dao » ca dao
cap o » cap 1, cap 5, ca o

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 do cuoi viet nam ) or ((( chuong trinh ((cham anh) or (pham hanh)) va dao ((cap o) or (cap 2)) hai viet nam ) or ( chuong ((trinh cau) or (trinh chat)) danh va cac ((cau co) OR (cay co)) dai viet nam ))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( cong trinh may doanh va cac cap do cuoi viet nam ) OR ((( chuong trinh ((cham anh) OR (pham hanh)) va dao ((cap o) OR (cap 2)) hai viet nam ) OR ( chuong ((trinh cau) OR (trinh chat)) danh va cac ((cau co) OR (cay co)) dai viet nam )))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( cong trinh may doanh va cac cap do cuoi viet nam ) or ((( chuong trinh ((cham anh) or (pham hanh)) va dao ((cap o) or (cap 2)) hai viet nam ) or ( chuong ((trinh cau) or (trinh chat)) danh va cac ((cau co) OR (cay co)) dai viet nam ))))".
• Adding a wildcard symbol may retrieve word variants: (( cong trinh may doanh va cac cap do cuoi viet nam ) or ((( chuong trinh ((cham anh) or (pham hanh)) va dao ((cap o) or (cap 2)) hai viet nam ) or ( chuong ((trinh cau) or (trinh chat)) danh va cac ((cau co) OR (cay co)) dai viet nam ))))*.