Perhaps you should try some spelling variations:
trinh cuu » trinh cau, trinh cua, trinh chu
trinh cao » trinh chao, trinh cau, tinh cao
trinh co » trinh do, trinh cong, trinh hoa
cuu luat » cua luat, huu luat, cuu thuat
cac cam » cad cam, cac cau, cac cay
cac cap » cao cap, cac cau, cac cay
luat va » xuat va, luat ve, suat va
so viet » hoc viet
hanh va » hang va, hanh vi
lanh va » anh va, lanh dao, doanh va
cam co » cac co, nam co, cay co
cho so » cho son, ho so, cho ro

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