Perhaps you should try some spelling variations:
thang cong » thanh cong, thang long, thong cong
chieu sang » chieu sach, chieu xanh, hieu lang
hanh dang » hanh dong, anh dang, hanh dung
van thang » van thanh, van khang, van hang
tan thanh » tran thanh, tang thanh, toan thanh
thanh cha » thanh ha, thanh nha, thanh phan
hieu van » hieu va, thien van, lieu va
dang van » hoang van, hang va
cong tan » cong tac, cong san, cong thanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc ((hieu van) OR (chieu sang)) - hanh dang van thang cong tan thanh cha~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc ((hieu van) OR (chieu sang)) - hanh dang van thang cong tan thanh cha*".