Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
chieu sang » chieu sach, chieu xanh, hieu lang
doi chieu » doc hieu, doi chi, mot chieu
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
hang cong » dang cong, hang nong, bang cong
tinh va » tich va, trinh van, trinh vat
luat » luan, xuat

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 va ((thong cong) or (hang cong)) trinh luat (dat* or data*)~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - hanh tinh va ((thong cong) OR (hang cong)) trinh luat (dat* OR data*).
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - hanh tinh va ((thong cong) or (hang cong)) trinh luat (dat* or data*)*.