Perhaps you should try some spelling variations:
trinh cao » trinh chao, trinh co, trinh cau
trinh cay » trinh cau, trinh may, trinh cac
cau lanh » dau lanh, cau nganh, chua lanh
hoc viet » hoc hien
cay lanh » cay lam, cay dan
cao tang » cao dang
cau danh » cao danh, chuc danh, nam danh
cao lan » cao van, cao dang, cao bang
cac nam » bac nam, cac cam, cac ham
tang va » trang va, tang van, thang va
tac cay » tac can, tao cay, cac cay
lanh va » hanh va, anh va, lanh dao
cay co » cac co, cay cong
nam co » nam cao, nam bo, nam so
ca tay » cam tay, ha tay, ca cay
tay co » ty co, tay o
lan va » luan va, lan van, lang va
va ca » va cao, va cai, va cau

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 lan va cac nam co so viet nam ) or ( cong trinh cao tang va tac cay co hoc viet nam ))) or ((( cong trinh ((cau lanh) OR (cau danh)) va ca tay co so viet nam ) or ( cong trinh cay lanh va ca tay co so viet nam ))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((( cong trinh cao lan va cac nam co so viet nam ) OR ( cong trinh cao tang va tac cay co hoc viet nam ))) OR ((( cong trinh ((cau lanh) OR (cau danh)) va ca tay co so viet nam ) OR ( cong trinh cay lanh va ca tay co so viet nam ))))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((( cong trinh cao lan va cac nam co so viet nam ) or ( cong trinh cao tang va tac cay co hoc viet nam ))) or ((( cong trinh ((cau lanh) OR (cau danh)) va ca tay co so viet nam ) or ( cong trinh cay lanh va ca tay co so viet nam ))))*".