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 tac » cong ty
tac phat » tac pham, tam phat, tan phat
phat cau » phan cau, pha cau, phap cau

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