Perhaps you should try some spelling variations:
thien hieu » thien nhien, thien chien, thien hue
hieu lang » chieu sang, hieu quang, nhieu tang
tong cong » trong cong, cong cong, dung cong
thanh lap » thanh san, phan lap, thanh hai
cua tong » cua cong, cuu tong, cua dong
cong san » cong tac
ban cua » ban quan

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

• Performing a fuzzy search may retrieve terms with similar spellings: thien hieu lang - van ban cua tong cong san ((thanh lap) or (thanh (thuy or thu)))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thien hieu lang - van ban cua tong cong san ((thanh lap) OR (thanh (thuy OR thu))).
• Adding a wildcard symbol may retrieve word variants: thien hieu lang - van ban cua tong cong san ((thanh lap) or (thanh (thuy or thu)))*.