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
tinh cua » trinh cua, tinh chat, tranh cua
sinh cua » manh cua, dinh cuu, sinh va
cong tan » cong tac, cong san, cong thanh
tan phan » toan phan, than phan, van phan

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 - hanh ((tinh cua) or (sinh cua)) nhung cong tan phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - hanh ((tinh cua) OR (sinh cua)) nhung cong tan phan tu.
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - hanh ((tinh cua) or (sinh cua)) nhung cong tan phan tu*.