Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong con, thuong dong
van thuong » va thuong, van chuong, van phuong
nhan lang » nhanh lang, nhan dang, nhon lang
hieu lang » chieu sang, hieu quang, nhieu tang
hanh luan » khanh luan, hang luan, hanh luat
cong van » cong vang, cong san, song van
ban chau » ban chat, ban cau, ban chan

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

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