Perhaps you should try some spelling variations:
thinh khong » tinh khong, trinh khong, thi khong
chieu sang » chieu sach, chieu xanh, hieu lang
toc chieu » toc thieu, doc hieu, hoc thieu
gian dang » gian dan, gian lang, gian dong
dang cong » dung cong
cong dan » cong san, cong tan, huong dan
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 chieu sang - thinh khong gian dang cong dan ((phan lap) or (phan dau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc chieu sang - thinh khong gian dang cong dan ((phan lap) OR (phan dau))*.