Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
hien lang » tien lang, hien trang, khien bang
hieu lang » chieu sang, hieu quang, nhieu tang
manh tung » manh hung, thanh tung
cong quan » cuong quan, cong quang, tong quan
va thong » va thuong, va phuong, he thong
quan van » luan van, quan va, quan luan
tung va » trung va, tuong va, dung va

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 tung va thong cong quan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((hien lang) OR (hieu lang)) - manh tung va thong cong quan van ban*.