Perhaps you should try some spelling variations:
chuong trinh » cong trinh
trinh cao » trinh chao, trinh co, tinh cao
trinh cau » trinh chat, trinh chao, trinh tu
trinh san » trinh han, trinh quan, trinh toan
cau giay » cuu giai, cac giai
hai viet » thai viet, mai viet, tai viet
san luan » dan luan, tang luan, hang luan
hoi viet » oi viet, thai viet, cuoi viet
van bao » van ban, van dao
bao cay » bao cao, bao xay, tao cay
so viet » hoc viet
co hoi » co hoc, co loi
cay co » cac co, tay co, cay cong
cay o » cay mo, cay ot, cay so
o hai » co hai, so hai, o lai

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 cao) or (trinh cau)) ban va ((cau xay) or (cau giay)) co hoi viet nam ) or ((( chuong trinh san luan van bao cay o hai viet nam ) or ( chuong trinh san luan van bao cay co so viet nam ))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( cong ((trinh cao) OR (trinh cau)) ban va ((cau xay) OR (cau giay)) co hoi viet nam ) OR ((( chuong trinh san luan van bao cay o hai viet nam ) OR ( chuong trinh san luan van bao cay co so viet nam )))).
• Adding a wildcard symbol may retrieve word variants: (( cong ((trinh cao) or (trinh cau)) ban va ((cau xay) or (cau giay)) co hoi viet nam ) or ((( chuong trinh san luan van bao cay o hai viet nam ) or ( chuong trinh san luan van bao cay co so viet nam ))))*.