Perhaps you should try some spelling variations:
trinh chao » trinh chat, trinh han, trinh co
trinh cao » trinh co, trinh cau, tinh cao
trinh cuu » trinh cau, trinh cua, trinh chu
lanh va » hanh va, anh va, lanh dao
cac cam » cad cam, cac cau, cac cay
so viet » hoc viet
luat va » xuat va, suat va, luan va
luat ve » luat viet
cac cap » cao cap, cac cau, cac cay
cam co » cac co, nam co, cay co
cap co » cap cho, tap co, cap do

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 chao)) lanh va cac cam co so viet nam ) or ( cong trinh cuu ((luat va) OR (luat ve)) cac cap co so viet nam ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( cong ((trinh cao) OR (trinh chao)) lanh va cac cam co so viet nam ) OR ( cong trinh cuu ((luat va) OR (luat ve)) cac cap co so viet nam )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( cong ((trinh cao) or (trinh chao)) lanh va cac cam co so viet nam ) or ( cong trinh cuu ((luat va) OR (luat ve)) cac cap co so viet nam ))".
• Adding a wildcard symbol may retrieve word variants: (( cong ((trinh cao) or (trinh chao)) lanh va cac cam co so viet nam ) or ( cong trinh cuu ((luat va) OR (luat ve)) cac cap co so viet nam ))*.