Perhaps you should try some spelling variations:
thanh trung » thanh tung
thieu sang » chieu sang, thieu khang, thieu quang
trung lap » trung cap, truong lam, truong lop
phan cong » thanh cong
cong tinh » cong trinh, cong vinh, long tinh
lap phan » lap phap, cap phan, phap phan
khan cap » khan ap, than cap, khoan cam
phan dau » phan tu, hang dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc thieu sang - thanh trung lap phan cong tinh ((khan cap) or (phan dau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc thieu sang - thanh trung lap phan cong tinh ((khan cap) OR (phan dau)).
• Adding a wildcard symbol may retrieve word variants: toc thieu sang - thanh trung lap phan cong tinh ((khan cap) or (phan dau))*.