Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
chieu xanh » chieu sach, chieu sang, chieu tinh
doi chieu » doc hieu, doi chi, ho chieu
hanh hang » thanh hang, hang hang, hanh han
nang hang » nang sang, hang hang, cang thang
cong tinh » cong trinh, cong vinh, long tinh
va thong » va thuong, va phuong, he thong
toan ban » van ban

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 xanh - ((hanh hang) or (nang hang)) va thong cong tinh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu xanh - ((hanh hang) OR (nang hang)) va thong cong tinh toan ban*.