Perhaps you should try some spelling variations:
manh tuong » manh tung, manh cuong, minh tuong
thong cong » trong cong, tong cong, thong thong
hien lang » tien lang, hien trang, khien bang
hieu lang » chieu sang, hieu quang, nhieu tang
cong luan » tong luan, cong tuan, dong luan
tuong va » truong va, thuong va, luong va
va thong » va thuong, va phuong, he thong

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((hien lang) or (hieu lang)) - manh tuong va thong cong luan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((hien lang) OR (hieu lang)) - manh tuong va thong cong luan van ban*.