Perhaps you should try some spelling variations:
thanh tuong » thanh thuong, thanh tung, thanh huong
thieu sang » chieu sang, thieu khang, thieu quang
thong cong » trong cong, tong cong, thong thong
tuong cua » truong cua, huong cua, thong cua
cua thong » cua thuong, cua khong, cua tong
cong toan » cong tan, cong hoan, cong tuan
khan cap » khan ap, than cap, khoan cam
phan lap » phan 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 tuong cua thong cong toan ((khan cap) or (phan lap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc thieu sang - thanh tuong cua thong cong toan ((khan cap) OR (phan lap)).
• Adding a wildcard symbol may retrieve word variants: toc thieu sang - thanh tuong cua thong cong toan ((khan cap) or (phan lap))*.