Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
chieu sang » chieu sach, chieu xanh, hieu lang
doi chieu » doc hieu, doi chi, ho chieu
hanh tran » hanh trang, thanh tran, hanh tram
van thong » van thuong, van phong, va thong
thanh lap » thanh san, phan lap, thanh hai
tran van » luan van
cong dan » cong san, cong tan, huong dan
than cap » khan cap, thanh cac, than cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu sang - hanh tran van thong cong dan ((than cap) or (thanh lap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - hanh tran van thong cong dan ((than cap) OR (thanh lap)).
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - hanh tran van thong cong dan ((than cap) or (thanh lap))*.