Perhaps you should try some spelling variations:
cong thuong » hang thuong
tinh hoang » minh hoang, dinh hoang, binh hoang
chieu tinh » trieu tinh, lieu tinh, chau tinh
hoang phan » hoang nhan, hoang thanh, hoang thoan
thuong tan » thuong han, thuong lan, thuong tin
hieu lang » chieu sang, hieu quang, nhieu tang
phan cong » thanh cong
tran 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: doc ((hieu lang) or (chieu tinh)) - tinh hoang phan cong thuong tan tran van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu lang) OR (chieu tinh)) - tinh hoang phan cong thuong tan tran van.
• Adding a wildcard symbol may retrieve word variants: doc ((hieu lang) or (chieu tinh)) - tinh hoang phan cong thuong tan tran van*.