Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong con, thuong dong
quan thuong » quang phuong, quang truong, quyen thuong
chieu sang » chieu sach, chieu xanh, hieu lang
hanh thong » anh thong, hanh trong, hang thong
hieu van » hieu va, thien van, lieu va
cong tan » cong tac, cong san, cong thanh
tan van » tran van, tang van, luan van

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu sang) or (hieu van)) - hanh thong quan thuong cong tan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sang) OR (hieu van)) - hanh thong quan thuong cong tan van ban.
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sang) or (hieu van)) - hanh thong quan thuong cong tan van ban*.