Perhaps you should try some spelling variations:
giao anh » giao hanh, giao thanh, giao tinh
soi viet » so viet, hoi viet, oi viet
trinh co » trinh do, trinh cong, trinh hoa
cac banh » cac benh, cac ban, cac bang
cac anh » cao anh, ca anh, cac nganh
gia anh » gia thanh, gia dinh, gia linh
cac cam » cad cam, cac cap, cac cau
cac nam » bac nam, cac ham, cai nam
bo soi » bo doi, bo noi, bo so
cam bo » can bo, cac bo, ca bo
co anh » cao anh, co hanh, do anh
anh va » hanh va
nam co » nam cao, nam so
nam lo » nam so

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 ((giao anh) OR (gia anh)) va cac ((nam co) or (nam lo)) soi viet nam ) or ((( chuong trinh ((cac anh) or (cac banh)) va cac cam bo soi viet nam ) or ( chuong trinh co anh va cac nam bo soi viet nam ))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( cong trinh ((giao anh) OR (gia anh)) va cac ((nam co) OR (nam lo)) soi viet nam ) OR ((( chuong trinh ((cac anh) OR (cac banh)) va cac cam bo soi viet nam ) OR ( chuong trinh co anh va cac nam bo soi viet nam ))))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( cong trinh ((giao anh) OR (gia anh)) va cac ((nam co) or (nam lo)) soi viet nam ) or ((( chuong trinh ((cac anh) or (cac banh)) va cac cam bo soi viet nam ) or ( chuong trinh co anh va cac nam bo soi viet nam ))))*".