Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
hieu manh » chieu xanh, hieu nganh, dieu hanh
cong nhat » cong nhan, cong ha, cong suat
hoc hieu » hoc thieu, hoc hien, doc hieu
trinh va » trinh van, trinh vat, trinh ve
cong sat » cong suat, cong san, cong chat
cong hat » cong chat, cong ha, cong hai
phan cau » phan dau, phan cac, phan tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hieu manh - canh trinh va nhung ((cong sat) or (((cong hat) OR (cong nhat)))) phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - canh trinh va nhung ((cong sat) OR (((cong hat) OR (cong nhat)))) phan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hieu manh - canh trinh va nhung ((cong sat) or (((cong hat) OR (cong nhat)))) phan cau".
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - canh trinh va nhung ((cong sat) or (((cong hat) OR (cong nhat)))) phan cau*.