Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
thanh tung » thanh cong
thong cong » trong cong, tong cong, thong thong
hieu lang » chieu sang, hieu quang, nhieu tang
cong dan » cong san, cong tan, huong dan
than cao » thai cao, than cap, than sao
toan cao » toan ban, toan tap
tung he » dung he, tung ho, tang he

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((hieu lang) or (chieu xanh)) - thanh tung he thong cong dan ((than cao) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((hieu lang) OR (chieu xanh)) - thanh tung he thong cong dan ((than cao) OR (toan cao)).
• Adding a wildcard symbol may retrieve word variants: doi ((hieu lang) or (chieu xanh)) - thanh tung he thong cong dan ((than cao) or (toan cao))*.