Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
nhung cong » dung cong, thong cong, hang cong
trung vap » trung cap, trung van, trung lap
cong suat » nang suat, cong san, cong cua
ho chieu » theo chieu, hoc thieu, doi chieu
trung va » truong va, trang va, trung ha
phan cau » phan cac, phan tu, phan lap
phan dau » phan tu, hang dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu sach - thanh ((trung vap) or (trung va)) nhung cong suat ((phan cau) or (phan dau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - thanh ((trung vap) OR (trung va)) nhung cong suat ((phan cau) OR (phan dau)).
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - thanh ((trung vap) or (trung va)) nhung cong suat ((phan cau) or (phan dau))*.