Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
nhung cong » dung cong, thong cong, hang cong
hien manh » hien hanh, tien manh, hieu manh
cong suat » nang suat, cong san, cong cua
trinh va » trinh van, trinh vat, trinh ve
phan cau » phan dau, phan cac, phan lap

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien manh - canh trinh va nhung cong suat ((phan cau) OR (phan tu))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien manh - canh trinh va nhung cong suat ((phan cau) OR (phan tu))".
• Adding a wildcard symbol may retrieve word variants: hoc hien manh - canh trinh va nhung cong suat ((phan cau) OR (phan tu))*.