Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
chieu sang » chieu sach, chieu xanh, hieu lang
doi chieu » doc hieu, doi chi, ho chieu
cong san » cong tac
chang tu » chang xu, hang tu, thang tu
chung tu » chung cu, thong tu
manh va » hanh va, anh va, minh va

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu sang - canh ((manh va) or (hanh vi)) nhung cong san ((chang tu) or (chung tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - canh ((manh va) OR (hanh vi)) nhung cong san ((chang tu) OR (chung tu)).
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - canh ((manh va) or (hanh vi)) nhung cong san ((chang tu) or (chung tu))*.